Answers · updated 1 October 2026
Each answer is rebuilt weekly from Signal’s published datasets — counts, sectors, submarkets and buildings from public registers. No company names: those are the product.
256 London companies are in market for an office move, fit-out or refurbishment right now (17 imminently), by Signal's weekly scoring of public registers; in the week of 28 Sept–4 October 2026 alone, 5 occupier moves, deals and requirements were publicly reported. Signal does not publish the names — it publishes the pattern, and sells the list.
238 office leases held by London companies Signal tracks expire in 2027 (Q1: 71, Q2: 72, Q3: 49, Q4: 46), 189 of them registered at HM Land Registry across 157 named buildings. Registered leases are a floor, not a ceiling.
32 major-works planning approvals landed at London office buildings in the last 8 weeks (to 4 October 2026) — 15 refurbishments, redevelopments or extensions and 13 changes of use away from offices; the largest: 55 Baker Street, W1U 8EW (558,743 sq ft of office floorspace, Westminster, ref 25/04398/FULL); 80 London Road, SE1 6LH (348,718 sq ft of office floorspace, Southwark, ref 24/AP/3432); 50 Victoria Street, SW1H 0TL (210,208 sq ft of office floorspace, Westminster, ref 26/01445/FULL). The full list, by week, is on the office-moves tracker.
Most London office decisions are made 9–18 months before the lease ends; the first public signs show 6–24 months out. Signal’s model typically gives 6–18 months’ warning before a move, fit-out or refurbishment.
Ten public-record signals precede an office move, fit-out or refurbishment: a lease heading for expiry, a break clause window opening, a planning application on their building, sustained office-based hiring, headcount outgrowing the floor plate, an ownership change, a funding round, maturing inside serviced or flex space, a poor EPC on the building, and accounts or filings turning late (a risk signal, read in reverse). The full field guide, with how early each shows and where to find it, is on its own page.
256 London companies are in market for an office move, fit-out or refurbishment as of 1 October 2026 — 17 of them imminently — out of 166,845 tracked. The figure re-runs weekly and is published on the Movement Index.