I've looked into mccpilotlog, and downloaded the PC and mobile software. It looks very impressive, and does pretty much everything I might need.
The cost isn't huge, as there is only a one time fee of 69 euros, and considering I'd never need to buy another paper logbook (at about £20 a pop) again it seems cost effective.
The options to export include either a PDF or a hardcopy printed in a choice of different standard formats. Any ideas if the CAA/EASA would accept this? It'd be a massive pain if I logged all my flying electronically and then had to go back and put it all into a paper book because the authorities won't accept the former.