Koko are one of the few places in London that do proper BIAB. Have been a few times now and super impressed, nails do not chip or peel, even after 4 weeks growth.
Treatment by Tech 1•Hard Gel Extensions & Overlays
Would go again for a reasonably priced manicure/pedicure for an event, it’s not luxury but gets the job done. Mine lasted 3 days then minor chips appeared.