I've seen this one asked before but never seen a definitive answer so I'll ask again:

I am insured to ride any bike with the owner's permission.
My friend wants to store his bike in my garage over winter but has taken it off the road (still taxed obviously but not insured).

Am I insured to ride it for him?

I'll ask my insurance company next week but wondered if there was a proper answer to this or whether it's down to individual companies and policies...

Any thoughts???