London is several audiences stacked on one map. Islington and Hackney lean toward flats and period conversions, where tenants move often and landlords hold one or two units.
Croydon and Bromley are outer boroughs of family houses, driveways and longer commutes, so a boiler service or a deep clean sells in a different tone. Richmond sits on the far west side, with its own postcodes and its own riverside buyers.
Meta lets you draw those differences into separate audiences, but only if the account is built that way. Trades should show Gas Safe and Part P details where the job needs them, and agents their redress scheme membership.
The licences stay with you, and HeyLead runs the marketing around them.