I took it back to the repair shop to point out the issues. They think they can sort the panel gap with a bit more care, so annoying it has to go back again though. My main concern is the panel gap can't be sorted because the body is warped because it had a new boot lid.
Another minor niggle I'm in two minds about complaining about because it might be too petty is the fact that the new numberplates they gave me have the ugly dealership label at the bottom, the dealership in question is a Seat garage as well. Before I had completely plain numberplates.