I've just bought a 2019 360R from Caterham, 5000 miles on the clock.
I will add that I'm in Cornwall so a trip to Crawley is impractical.
There is a misfire at 3500-4000 rpm which is a PITA as it's dual carriageway cruising speed. The car starts and runs fine and is great above and below that range. It's not cutting out, just a hesitation.
Any suggestions as to where to start looking?