Who does it, whos cheapest, who would you recommend?

A search turned up nothing except normal insurance, surely someone uses build insurance?

I used Osborne & Sons. £85 for a year up to a maximum of £5k value. Unused portion can be offset against road insureance once you get that far

MSM do it.

www.msminsurance.co.uk

Don't know the build prices but they insure my car for a good price.

Thanks guys, managed to get it thru adrian flux for agreed value of £12,000 with a £200 excess fire and theft risks, 12 months £95

What exactly is build insureance?
insuring the parts against theft?

Against theft, fire or accidental damage