Endsleigh offer a pretty reasonable deal. They came to our stand at uni this year and offered to insure our bikes. They told me their policy covered race crashes, theft and any broken bits. They would replace said parts like for like new.
This meant in real terms if my Orange 222 broke they’d replace it with a brand new 224 evo (like for like new). The downside is that they won’t insure anything over 1.5K, hence why they couldn’t insure the Orange (they were rather shocked when I told them how much a 222 was when it was brand new.
I think they’d have wanted a one or two hundred pounds for my hardtail (worth 1500 if you bought everything new including the custom spec), but I didn’t have any spare cash.