Thanks everyone for the advice, especially Pedro41for the link to the Suzuki Service Plan - will definitely go for that! It quoted £760ish for 2 years, including the 14500 service and the next 3. Which highlights how overpriced the Bridge quote is - I'll have words!
Electrics problem is apparently a bust stator - not cheap, but full credit to Suzuki for knocking £80 of the price even though it's out of warranty.