Stuck on a few:
1a Mobile seating (5) s????
26a Dropping seating (5) S?O??
2d Unsound, bow and folding seat in back of car (5) ??C?Y
3d Vexation, drag (8) ??i?A?C?
21d Blocks ground floor seating (6) ?T???S
25d Region, locality (4) ?U?A
Just logged on to get some answers and decided to do a search first, glad I did as I got some of the answers I wanted so thank you maclarencat and dunroamin.