My CEL has been intermittently going on for 30-45 min at a time. 800 miles on the car. No overt engine issues, no overt findings (pipes, wiring, etc). At the dealer, everything checks out. Awaiting word from Morgan on trying some things via the computer diagnostics. On this side of the pond, we wait till the next day to hear from Malvern. Otherwise looking at an ECU replacement.
Use a CTEK charger via 12v socket, works great.