Welcome from the Colonies, Andrew !
I think the pedals are set on the furthest fixing - which is still tight for me, is it possible to move them a little further back? Also whilst on the pedals, they are very close together - several times I have found myself pushing the brake and accelerator when I want to stop - was the pedal set changed on more recent cars, or again is this adjustable?
Fit a slice of 2X4 under the front of the seats to raise them a bit. Also source narrow driving shoes or F1 boots. Half the fun of ownership is all the new kit you get to buy ...

Tally Ho !