North Oxford, who are normally on the ball when it comes to things K-related, were not sure whether I could buy the plan for a 7 year old bike that wasn't purchased from them, so they went off to investigate.
They came back today, and it turns out you can. It's obviously not something they push.
The only additional info they need off you is the exact mileage when you take the plan out.
Optimist that I am
, I've opted for 5 years/30k miles which takes me, or the next owner, to 55k miles.
I picked 5 years because I'm about to do about a 4-5k mile stint in the next 2 months, so that means 2 services in quick succession, which would be in the region of two lots of £300 anyway.
The 5 year option comes out at £208 per service * 5 services - cheaper than (almost?) all services I can recall in the past 6 years.
If you know you're going to keep your bike for several years, I can't see any disadvantage other than tying your money up, which you've already done by buying the bike in the first place.