Hi Nidge,
I've trawled all the books for the livery details and the detail variation of this one and found the BSS no. for the yellow hidden away in one of Adrian Curtis' books.
We'll obviously restrict any renames to the Swindon examples. Why Invader? - although not in this livery, Pathfinder, Talisman and Venturer have, or are being done recently -
Harrier sounds like an aircraft and Stalwart a bit well.. warty. Besides, I just liked the name!