A fresh wave of bulk investment activity is pushing up rents in London's luxury residential sector, as thenegotiator.co.uk reported. The mechanism is straightforward but consequential: when institutional buyers and large-scale investors acquire entire blocks or significant tranches of high-end units in a single transaction, they remove that stock from the ordinary sales market and reroute it into managed rental portfolios, tightening the pool of individually let properties and putting upward pressure on achievable rents in the prime segment.