Thanks for the replies & sharing of knowledge - much appreciated.

That's exactly the bike that I have, although the one store that still displays the FSA Crankset on its website (out of stock) says it's 110 rather than 130 BCD. Can you tell from looking whether the chainrings are removable from the cranks on this product as I believe this isn't always possible?

Anyway it's good to know that having slightly different gears shouldn't be an obstacle. I'll see what's out there in a similar spec & hopefully find something that works. Poor bike has been neglected recently but hopefully a new drivetrain will make a huge difference.