Home/Services/Legacy Replacement/London
Build · London
Legacy Replacement in London
This region industrialised early in software terms too. A great deal of genuinely excellent process knowledge is locked inside systems written decades ago for one business, by someone who has since retired.
Can you replace a legacy system for a business in London?
Yes. GTX Digital migrates businesses in London off unsupported, undocumented or end-of-life software, in stages, without stopping the operation.
- Starts with documenting the existing behaviour, including the undocumented.
- Migrates in stages, with old and new running together and reconciled.
- Treats data migration and validation as a first-class deliverable.
London · Greater London
Head offices and professional services, served from the Triangle
London work reaches us when the brief is well defined and the client wants senior delivery without London rates. Vague, exploratory work is better served by somebody who can be in the room every day.
London is outside the Golden Triangle, and we are straightforward about that: we are a Midlands business working with London clients rather than a London agency. What that buys you is Midlands delivery economics with genuine seniority on the work, and what it costs is that we are not twenty minutes away.
For this work that lands mainly in Financial & professional services, Corporate head offices and Technology & media.
Coverage
London and nearby
Most of the work is around the City, Canary Wharf and the West End, with access from the M1 and M40 from our side, with direct rail from Birmingham, Coventry, Rugby, Milton Keynes and Northampton.
- Watford
- St Albans
- Croydon
- Reading
- Luton
- Chelmsford
Where it lands
The London sectors this work suits.
Drawn from what London is actually built on, rather than a list of industries we would accept work from.
-
Financial & professional services
Firms with matter, case and client-data requirements, and procurement processes to match.
-
Corporate head offices
UK and group headquarters functions with security review, procurement and group reporting attached to every project.
-
Technology & media
Product and platform businesses, usually with their own engineering teams and existing commitments.
How we work here
What legacy replacement looks like in London.
The full scope, phases and deliverables are on the Legacy Replacement service page. These are the parts that are specific to working here.
-
Mapped before replaced
We establish what the system actually does from its data, its outputs and the people who use it, and write it down. Usually the first time anyone has.
-
Incremental, never big-bang
One bounded piece first, reading from the old system while it still runs. A weekend cutover concentrates all the risk into one weekend.
-
Reconciled, not hoped
Rehearsed migrations with reports proving balances, counts and histories match before anything is switched off.
-
Knowledge out of heads
The business rules and the reasons behind them, documented. That often outlives the project and is the most valuable thing produced.
-
On site in London
London is a direct train for us from several points in the Triangle, so a scheduled on-site day is straightforward even though we are not local. Discovery and the sessions that decide a design happen in person; delivery then runs remotely with scheduled reviews, and there is no travel charge inside the Golden Triangle.
Questions
Legacy Replacement in London, answered.
The questions businesses in London ask before they commission this work.
What does a legacy assessment cost for a London business?
The assessment is a small fixed-price piece of work, typically a few thousand pounds over two to four weeks, producing a written map of the system, a risk register and costed options. It is deliberately standalone: you can take it to any supplier, including ones who are not us.
Do you work on site in London?
London is a direct train for us from several points in the Triangle, so a scheduled on-site day is straightforward even though we are not local. Discovery, process mapping and the sessions that actually decide a design are done in person wherever we can; delivery then runs remotely with scheduled reviews. There is no travel charge inside the Golden Triangle.
Same service, other locations
Legacy Replacement across the Golden Triangle.
We deliver this service throughout the corridor. See every location we cover.
Legacy Replacement elsewhere
Other Build services in London
Next step
Talk to someone who can be in London this week.
A short, structured conversation about where your systems are costing you time, margin or growth. We will come to you — the sessions that actually decide a design do not work over video.