Bit more progress to report at last, not had much garage time lately so just been collecting parts and getting stuff done as and when.
Managed to source a replacement parcel shelf so that was expertly welded in by Cradley_Heathen, real pleased with it.
Picked this up too, will be mounting it once the cage is in and hopefully use the dash bar to mount off.
Next big job was mounting the seats as they needed to be in before it goes for the cage in a couple of weeks.
Not sure I'll end up being able to stick with these seats as they're pretty wide at the top so clash with the B pillar. I've had to mount them further back which will probably get in the way of where the main hoop needs to run. I know Cobra Monaco's will fit as I had them before but they're about 3kg heavier than these seats.
Ended up making my own brackets as I couldn't get any from Topcat in time.