The words behind UK lead generation, in plain English. Type one into the box and it answers in a sentence. The 39 cards below narrow with you.
NO CARD · 25 FREE LEADS TO PUT THE TERMS TO WORK
A yearly filing that confirms the details Companies House holds are correct.
ONE SENTENCE FIRST · THE DETAIL UNDERNEATH
Every term files under one of four sets, and each set wears its own colour wherever it appears on this page. Pick a set, pick a letter, or type into the box above. All three drive the same cards.
What the public record actually holds about a company, field by field, and what each one is worth to you.
12 termsThe dates every company has to hit, what it costs to miss one, and why a deadline is a reason to write.
7 termsThe compliance terms and the deliverability terms in one set: what the law allows, and what makes mail arrive.
9 termsThe words the app itself uses, its screens and its switches, defined in the open so nobody has to guess what we mean by them.
11 termsThe first line of each card is the whole answer. The rest is there when you want it, and where a term has a tool or a guide behind it, the card says so.
39 terms defined · 22 linked to a tool or a guide · updated September 2026
The free file Companies House publishes monthly with every live company on the public record: name, number, registered office, status, incorporation date and SIC codes.
It is the raw material behind bulk register analysis, including our formation statistics, and the honest caveat that comes with it: it lists companies alive today, so long-ago months undercount by the companies that have since dissolved.
The formations tracker built from itA code ending in 'n.e.c.' (not elsewhere classified), such as 82990 or 74990.
Companies pick one when nothing else fits. Lists built on catch-all codes are noisy and mixed. So they need extra checks before you write to anyone.
Example: SIC 82990The UK government's registrar of companies.
Every limited company, LLP and PLC in England, Wales, Scotland and Northern Ireland sits on its public register. So do their filings, officers, registered address and status. The public record is public data. It is the base of UK B2B prospecting.
The number Companies House gives a company at incorporation.
It is usually 8 characters long. A company name can change. This number never does. So it is the safe key for matching UK company records and spotting doubles.
The date a company was registered at Companies House.
It is a strong buying signal. A new company needs an accountant, a bank, insurance and a website in its first few weeks. The public record publishes new incorporations every day.
Find recently incorporated companiesSize bands for filing accounts.
Micro-entities and small companies may file cut-down accounts. So the band a company files under is a public clue to its size. A change of band between years is a growth signal, or a shrinking one.
The licence covering most UK public-sector data, including the Companies House register.
It allows free reuse, including commercial reuse, on one condition: attribute the source. It is why register data can power products and statistics, and why every Leadistry page that shows register figures carries the attribution line.
Where our data comes fromSomeone who owns or controls more than 25% of a company's shares or votes.
It also covers anyone else with significant control. The PSC register is public. It names the real decision-makers behind small companies.
A company's official address on the public record.
Statutory post is served there. It is often an accountant's office or a formation agent, not the trading site. So targeting by this postcode alone can mislead. Cross-check it against the company's website.
A paid service that supplies a compliant registered office address, so a company's official mail goes somewhere staffed while the business runs from anywhere.
Lawful and very common: some London service addresses are the legal home of tens of thousands of companies. It is why a registered address says where paperwork goes, not where a company trades.
The UK's busiest registered addressesThe 2007 revision of the UK Standard Industrial Classification, still the version in force.
SIC 2007, SIC07 and UK SIC all name the same list. It nests five tiers: section (a letter, A to U), division, group, class and the five-digit subclass a company actually files. Companies House accepts the condensed list of about 730 codes.
The full SIC guideA 5-digit code that says what a UK company does.
SIC is short for Standard Industrial Classification. Each company picks up to four SIC 2007 codes at incorporation. It can change them on any confirmation statement. Companies House does not check the choice. SIC codes are the main way to split the public record by industry.
Browse UK SIC codesThe last day of a company's financial year.
By default it is the last day of the month, one year after incorporation. Accounts are due 9 months after the ARD. That is what makes filing deadlines easy to predict and worth prospecting on.
A security a lender holds over a company's assets, such as a mortgage or debenture.
It is recorded at Companies House. A company with an active charge has borrowed against what it owns. That is a useful signal for commercial finance brokers and refinancing services.
The accounts every UK limited company must file with Companies House.
They are normally due within 9 months of the accounting reference date. File late and the fine is automatic. It starts at £150 and rises to £1,500. It doubles if you are late two years running.
Filing deadlines explainedThe public record marks each company as active, dissolved, in liquidation or in administration.
There are other states too. Only active companies are prospects. A dissolved company no longer exists in law. Status changes are signals as well. Strike-off often follows missed filings.
A yearly filing that confirms the details Companies House holds are correct.
It is due within 14 days of the end of the company's 12-month review period. Filing late brings no automatic fine. But keep missing it and the company can be struck off and the director taken to court.
The date a company's accounts or confirmation statement must reach Companies House.
A deadline that is close is a timing signal. It suits accountants and company secretarial services. A firm near its deadline is picking who does the work.
Removal of a company from the public record, after which it stops existing.
Voluntary strike-off is the company applying to close itself. Compulsory strike-off is Companies House removing a company that stopped filing, and it starts with missed confirmation statements or accounts. A live strike-off notice is public, and it is one of the clearest closing-down signals the public record carries.
Filing deadlines as signalsA dated, public event that says a company is about to need something.
It could be an incorporation, a filing deadline coming up, a new charge or a change of size band. Outreach built on signals beats cold lists. The timing gives you the reason to write.
UK company buying signalsPECR's word for a subscriber that is a company, not a person.
Email to a corporate subscriber's addresses falls under PECR's B2B rules. That includes a named employee's work address. Consumers and sole traders get the stricter consent rules instead.
Checking that an address can really take mail before you send.
There are three layers: the format, the domain’s DNS MX record, and an SMTP probe of the mailbox itself. Leadistry runs the first two. The third is what paid verification services sell, and we do not do it, because the only way to prove a particular mailbox is live is to send to it. Keep bounces under 2 to 3 percent. That protects your sender reputation, which is the part of deliverability you can actually control.
Free email verifierThe lawful basis most B2B prospecting uses.
You can process data if a real business need is not outweighed by the person's rights. The ICO sets a three-part test for this. Write your answers down. Give an easy opt-out. You do not need consent.
Raising how much you send from a new mailbox or domain, slowly.
A few emails on day one, then more each week. Providers learn the sender is real. Skip warm-up and a brand new mailbox's first burst gets treated as spam. Leadistry starts a new mailbox at 5 emails a day, then 10, 15, 20, 25 and 30, and only moves up after a day it actually sent.
How your mailbox warms upThe Privacy and Electronic Communications Regulations.
These are the UK rules for marketing by email, phone and text. PECR lets you email corporate subscribers with no prior consent. That means limited companies and LLPs. You must say who you are. You must honour every opt-out. PECR bans cold marketing calls to TPS-registered numbers.
The three DNS records that prove your email is really yours.
SPF lists the servers that may send for a domain. DKIM signs each message. DMARC says what to do with mail that fails both. Mailbox providers now expect bulk senders to pass all three.
Free domain checkerThe UK's official do-not-call register.
Under PECR, a cold marketing call to a TPS-registered number is unlawful. That is why lawful UK prospecting is email-first. It is also why we never sell phone numbers.
A grade Leadistry gives every company website it confirms.
We fetch the site and check the HTML. We look at mobile layout, HTTPS, page count, stale copyright lines and old site builders. Sites come back modern, dated or poor. Ask an agent for companies whose website was graded poor and you get prime prospects for web designers and marketing agencies. Every lead still arrives with a business email the company publishes.
Find UK businesses with a poor websiteA standing search you set up by talking to the assistant.
It holds the kinds of business you sell to, one area (a town, a city, a region or the whole UK) and the reasons to look for. Each agent has its first look within a minute and looks all day after that, putting new matching companies on your Feed. Two agents never cover the same companies.
How agents workWhere Leadistry connects to the tools you already use.
One button makes your leads link, a private address that Google Sheets, Zapier or Make can read. Or paste a Zapier, Make or Slack webhook address, and every new lead and every reply is sent to it. Connect Claude and the Chrome extension live here too.
See AppsThe switch on the Feed that sends for you.
With it off, you approve each first email yourself. With it on, every email from your agents goes out on its own in your sending hours, whether or not you log in. One click turns it off again, and anything it took that has not gone comes back to you.
Autopilot on the FeedLeadistry's billing unit, and the only thing you are ever charged for.
A lead is a UK company from the Companies House register. It comes with a website we opened and a business email the company publishes, every time, and the director's name when it is on the public record. Anything else we can find alongside it comes at no extra charge. A lookup we cannot complete is held back, never counted and never charged for, and if your first email to a lead bounces, that lead is credited back automatically, once. That is the real difference from paying per seat.
Your leads as statements, like a bank's.
Leads are saved every month, and Exports keeps monthly and weekly statements you can download as spreadsheet files. It comes with the paid plans.
The two names Leadistry used before the Feed.
Flow came first, then Pipelines, and both described the same canvas of source, enrich, verify and email steps that you built by hand. Neither name exists in the product now. Anything you read under either one means the Feed, which does the same work without anyone having to draw it.
See what replaced themThe screen with every company we have found for you, including your 25 free ones.
Each row shows the company, the director, the email, the website, the social pages we could confirm are theirs, and a plain status for the email: not emailed yet, waiting, sent, replied or bounced. On a paid plan you can download exactly the rows you are looking at.
See LeadsThe switch that pauses your whole account in one click.
It sits beside the date on the Desk. While it says Paused, nothing is found, spent or sent. Switch it back to Live and everything carries on.
How every email you send looks.
Pick Letter, a plain white email, Designed, Announcement or a look you saved, then add your logo, your colours, up to 3 pictures or a banner, a video and your social links. The first line is always written for each company; every other part is your exact words or written by the AI from your brief.
See the TemplateThe first screen after you log in.
It shows this week's emails, replies, wins and leads left, one suggestion at a time backed by your own numbers, and your replies with an answer drafted for each one. It never answers for you: you press send.
See the DeskLeadistry's morning list, and the screen most customers live in.
Each morning the agents read the latest filings, check the sites, test the emails and write a first line off the reason each company was picked. What is waiting is every company found and checked since you last looked, each carrying the company record, a dated reason, a website we opened, a checked business email and an email already written. Nothing reaches anyone until you approve it, or until you switch on Autopilot. It was called Pipelines until 2026.
Explore The FeedSee also: SIC codes · FAQ · How we compare · Data sources
The public record is public data. It is the base of UK B2B prospecting.
From the entry on Companies House · published under the Open Government Licence
Put these terms to work. 25 free leads, each with a website we opened and a checked business email, no card. Your first agent takes about two minutes to set up.