London at the limits of data centre market dominance and infrastructure expansion 

This month's major planning approvals for two large-scale data centre developments, one located within London and another in its immediate periphery signal a continued acceleration in the UK’s digital infrastructure build-out.  Castleforge and Galaxy Data Centers’ expansion of their £500 million Redhill campus, together with the £1 billion, 72MW hyperscale facility developed by Pure Data Centres in partnership with SEGRO, underscore sustained investor conviction in the UK’s position as a leading European data infrastructure hub.  London is Europe's largest data centre market by a substantial margin. The UK held approximately 1.6 GW of total colocation capacity in 2024, with Greater London accounting for the vast majority of that figure. It is estimated that London's installed capacity is around 1.1GW. The UK market is the anchor of the FLAP-D grouping: Frankfurt, London, Amsterdam, Paris and Dublin which together grew from 1.8GW of combined live capacity in 2019 to 3.6GW by 2025.  This second instalment of the FLAP-D series turns to London, building on yesterday’s analysis of Frankfurt to examine the evolving dynamics shaping Europe’s most strategically important data centre markets.