↳ Est. London 2012 ICAEW-regulated chartered accountants HMRC agent Companies House authorised formation agent 2,300+ companies administered Serving 42 countries ↳ Est. London 2012 ICAEW-regulated chartered accountants HMRC agent Companies House authorised formation agent 2,300+ companies administered Serving 42 countries
Chartered accountants & company services

Your British
company, properly
administered.

Formation, business banking, a prime London address and year-round chartered accountancy — under a single engagement. A quietly confident partner for founders who'd rather get on with building.

MK
ND
SP
+9
2,300+ international founders trust us with their UK compliance.
Engagement sheet
Four services.
EST • LONDON • MMXII • HOLBORN & CO •
H&
  • 01 Accountancy FEATURED
  • 02 Company formation 24–48 HRS
  • 03 Business banking UK & EMI
  • 04 London mailbox WC1
38 HANOVER SQ · W1 EST. MMXII
Central London skyline at dusk
Based in the City · Serving the world

A British foundation for
an international ambition.

From our offices in central London, we represent founders across forty-two countries — preparing their UK companies, holding their mail, introducing their banks, and keeping their accounts.
51.5074° N · 0.1278° W
LONDON · W1
Credentials & regulation
ICAEW member firm
HMRC registered agent
Companies House authorised
AML supervised by HMRC

One comprehensive
partnership — four quietly
essential services.

We find that UK businesses rarely need one thing in isolation. Formation without banking is stranded. Banking without an accountant is exposed. We bundle the four services a British company actually needs — and we bring them under one roof, with one point of contact.
Documents being signed — UK company formation
SERVICE 02

UK Company
Formation

Limited company registered at Companies House in 24–48 hours. Bespoke articles, share structure, PSC filings and digital documents — all handled by our in-house formations desk.

  • Ltd, LLP or PLC
  • Non-UK resident directors
  • Registered office included
  • Bespoke articles drafted
Formation details
City of London financial district
SERVICE 03

UK Business
Banking

We introduce your company to tier-one UK high-street banks and leading EMIs — with a pre-prepared KYC pack that cuts the usual rejection risk. Accounts typically opened within two weeks.

  • High-street & EMI options
  • Multi-currency accounts
  • Works with non-resident directors
  • Pre-vetted application pack
Banking details
Classic central London street — prime mailbox address
SERVICE 04

Prime London
Mailbox

A genuine Hanover Square, W1 address for your company and directors. All post scanned the same day, forwarded on request, or held securely. Usable as registered office and director service address.

  • Prime W1 postcode
  • Same-day mail scanning
  • Global forwarding
  • Registered office included
Mailbox details
01

Every statutory
obligation, quietly
discharged.

Running a UK company means a steady stream of filings to HMRC, Companies House and beyond. Miss one, and penalties compound. We don't. Our monthly retainer covers everything a British limited company needs, prepared and filed by qualified chartered accountants.

Accounts being prepared — calculator and ledger
FIG. 01 — YEAR END PREPARATION
STATUS : ON TIME
CT600 · VAT · PAYE · CS01 — ALL UNDER ONE RETAINER
Partner's note

"Our clients don't want 'tax advice' in the abstract. They want someone who knows their numbers as well as they do, and who picks up the phone. That's what we're here for."

AM
Amelia Marchant FCA
Managing Partner
What the retainer includes
MONTHLY
Bookkeeping
Reconciled ledger, categorised transactions, monthly reports.
ANNUAL
Statutory accounts
Filed with Companies House under FRS 102 / 105.
CT600
Corporation tax
Return prepared and submitted to HMRC. Optimised.
QUARTERLY
VAT returns
Making Tax Digital compliant. Flat rate or standard.
PAYE
Payroll & pensions
RTI submissions, payslips, workplace pension filing.
CS01
Confirmation statement
Annual Companies House filing, PSC register maintained.
SA100
Director self-assessment
Personal tax return for up to two directors, filed.
ALWAYS
Advisory access
Direct line to your dedicated accountant. Unlimited email.
Request a proposal

From a call on Monday
to a fully operating
UK business by Friday.

A linear, predictable path. No chasing, no mystery stages, no "we'll be in touch". We tell you exactly what happens next, and when.
01 —
Discovery call · 30 MIN · FREE

A partner walks through your business, your goals, and which services you actually need. No sales. A written engagement proposal follows within 24 hours.

DAY 1
02 —
Company formed at Companies House

Articles drafted to your specification, share structure designed, directors and PSCs registered, digital certificate of incorporation issued.

DAY 2
03 —
Mailbox & registered office go live

Your W1 address is registered with Companies House and HMRC. Mail-handling dashboard activated. Director service address assigned.

DAY 3
04 —
Banking introduction prepared

We assemble your KYC pack and introduce you to the bank or EMI best suited to your business. Accounts typically open within 10–14 working days.

DAY 4
05 —
Accountancy retainer commences

Dedicated accountant assigned. HMRC agent authorisation filed. Bookkeeping system configured. First monthly report scheduled. You get on with the business.

DAY 5+
2,348
UK companies formed & administered since 2012.
12 yrs
continuous regulatory compliance — every client, every year.
97%
of retainer clients remain with us into their second year.
42
countries represented among our current client book.

The difference
is in the detail.

Most firms will do one of these things. A few will do two. Almost none will do all four, to this standard, under a single engagement partner.

i.
A qualified accountant on every account

Not bookkeepers with a supervisor. Every client is allocated an ICAEW-qualified accountant with at least five years' post-qualification experience.

ii.
A genuine Hanover Square address

Not a serviced office in Croydon with a central forwarding address. Our offices are physically in W1 — and your post is physically received there.

iii.
Fixed fees. No billable minutes.

One transparent monthly retainer covers your accountancy. No six-minute-increment billing. Call us as often as you need.

iv.
One engagement. One partner. One invoice.

Formation, banking, mailbox and accounting under a single client agreement. One point of contact. One consolidated monthly statement.

v.
Built for non-UK residents

We're fluent in the specific paperwork, banking hurdles and AML demands that foreign directors face. It's most of what we do.

Founders we've quietly built
UK businesses for.

"

Having one firm handle the company, the bank intro, the office address and the year-end accounts meant I never had to explain my business twice.

Martín K.
Founder · SaaS, Buenos Aires → London Ltd
"

We'd been rejected by three banks before Holborn introduced us. Their KYC pack is the difference. Account opened in eleven days.

Priya N.
Director · E-commerce group, Mumbai
"

Amelia's team flagged a £14k corporation tax saving we'd have missed entirely. The retainer paid for itself in the first quarter.

Jens R.
CEO · Consultancy, Copenhagen

Things
we're
often
asked.

Can't find your question? Our partners reply to every email within one business day — often within the hour.

Ask us directly
Do I need to be in the UK to form a company or open a bank account? +
No. The vast majority of our clients are non-UK residents. We can form your company, register the W1 office, and introduce you to banking partners who work with non-resident directors — all remotely. You do not need to visit the UK at any point in the process.
What does the monthly accountancy retainer cost? +
Retainers start at £149/month for a dormant or early-stage company and scale with transaction volume, VAT status, payroll headcount and complexity. We quote a fixed monthly fee after the discovery call and hold it for twelve months. No surprises, no hourly top-ups.
Can you take over from my existing accountant? +
Yes — and we do this most weeks. We issue the professional clearance letter, retrieve your records, re-authorise ourselves as HMRC agent, and pick up mid-year without disruption. The transition is usually invisible to your business.
Is the London address usable as my registered office? +
Yes. Our Hanover Square address can be registered as your company's registered office with Companies House and as each director's service address. It appears on Companies House filings exactly as shown: a prime W1 postcode. This is included at no additional cost with the mailbox service.
Which banks and EMIs do you introduce clients to? +
We maintain active introducer relationships with several UK high-street banks, challenger banks, and regulated EMIs supporting multi-currency accounts. We recommend the partner best suited to your residency, sector and turnover — and prepare the application to meet their specific KYC requirements.
How quickly can my company be trading? +
Company formation itself is typically complete within 24 hours of your discovery call. Registered office and mailbox go live the same day. Banking is the slowest step — usually 10 to 14 working days, depending on the chosen partner and your residency. From day one, you can sign contracts and issue invoices using your incorporated entity.
&
Begin

Start your British
company
this week.

Book a 30-minute call with a partner. No obligation, no sales pitch — a direct conversation about whether we're the right fit, followed by a written proposal within 24 hours.

Book a discovery call
Or call directly: +44 20 7123 4567. We answer 09:00–18:00 GMT, Monday to Friday.