So....
Mon morning: email contact
Wed morning: dropped off
Thu teatime, an email saying
.... I've dowelled the existing hole, redrilled and refitted the button for you and its all secure again for you. Total for the repair is:- £25 ....
and I've arranged to pick it up now, Friday morning. Quickly done. Phil met me, nice smiles.
This all done socially distanced so I won't have a chance to inspect until I get it home.