Back home, thanks Terry for organising this with Ferrari Dave.
Had a good run over but after the painfully slow queue into Oulton Park, when parking up 'cambiocorsa' decided that after giving her such a hard life in the crawling traffic, I didn't deserve to get reverse, and forget about any forward gears too! just neutral, she had had enough, with only the red gearstick warning light. A quick ignition on and off got me reverse and second to park up.
Decided to turn everything off at the battery while there, and on restart over 3 hours later all back to normal. Perfectly behaved the 50 miles back home, including stop start traffic on the M56, and maneuvering back into the garage at home.
Go figure?