Had a close look at spare door lock today it has excess play in the spindle that handle turns , when the handle is returned by the spring the outer casing is worn allowing extra movement , door catch sliding section has 3mm + lateral movement so door would fall back away from seals.
Compared this to one currently fitted and it is the same .
Might have to bite the bullet and buy a new anti burst set up for drivers door as a mpore secure option to a replacement early type.