I couldn't see any sign of the door being welded, but the trim and sheeting had that "interfered with previously" appearance which led me to assume the door had been in bits before, maybe for a new window or a lock problem etc.
While we are here I am having a bit of a problem with the lock striker. The door needs a careful slam otherwise it bounces onto the safety catch (and always bounces first thing when the temp is freezing or below); if I adjust the striker out a fraction for an easy slam with no bounce the rear seals let too much air whistle through at speed (ye gods my old, caned and battered Volvo never did this...).
The all-singing approved LR warranty specifically excludes lock strikers or hinges (it also specifically excludes water leaks but Lancaster did fix those foc..), so will a new striker fix the bounce?
Edit - strikers are less than a fiver from Paddocks, the old one is visibly worn, I should just try one anyway.