the loom breaking won't dead lock the van and of the side door contacts are not making the door will auto open and unlock the van as it can't read a closed door
if the key ./ lock is dead then it will beed replacing anyway
so a 10mm drill but and drill the centre lock tumblers out then with a small screw driver you can get the sliders to drop out of the tumbler
once you have done this bet a big flat screwdriver and unlock the door