Every week, hundreds of London companies move toward a move, refit or refurbishment — a lease ending, a planning application, a growth spurt. The Index counts them, live, by submarket and sector — so you can see where the demand is before it reaches the market.
Across the 21,104 London companies Signal tracks, 1,257 are in market for an office move, refit or refurbishment right now — and 71 are moving imminently. A further 390 have a lease event (a break clause, expiry or rent review) landing within the next 18 months — the window in which most office decisions are made. — Signal, June 2026
In-market companies by London postcode area.
The most active sectors moving toward an office change.
Companies with a known lease event ahead — the clearest signal of a move or refit, and the window to reach them first.
Central London office demand has rebounded sharply. Vacancy has fallen to around 7.4% in early 2026 from a peak near 10.6% a year earlier; 2025 take-up reached roughly 12 million sq ft — the strongest since the pandemic — and Grade A space in the prime City and West End cores is under 1% available. With the best space scarce, the firms that reach an occupier before they go to market win the work.
Signal tracks 21,104 London companies and scores each on how likely it is to move, refit or refurbish its office soon — using the public records that precede an office change: HM Land Registry lease data, Companies House filings, local-authority planning applications, and hiring and growth signals. "In market" means a company scoring 60 or above; "hot" means 80 or above. The Index is rebuilt from this live data and refreshed weekly.
Office-move signals from public record (HM Land Registry, Companies House, local-authority planning) plus hiring, growth and news. We don't scrape. Figures as of 22 June 2026.
The Index is the shape of the market. Signal hands your team the actual companies — scored, timed, and ready to call, on your patch.
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