Matt reminded us that this was something we should be thinking about.
So I contacted our regs man Stuart Anderson at BBS.
His response here:
We work in conjunction with a company called Build Zone.
They provide a 10 year structural warranty and use BBS to carry out their site inspection. This means that once the policy is in place you just deal with me for both the Building Control and the Warranty.
I am unable to provide you with a quotation directly and have to ask you to contact them.
Telephone:- 0345 2309873
Stuart Anderson C.BuildE MCABE
Building Control Surveyor
So - I'll get a quote from Build Zone and also will ask a guy called Chris Branigan at CRL (https://c-r-l.com) - who's name/company - has cropped up on a number of occasions.
Will post further information when received. Like - how much it is going to cost and what info you need to provide - to get a quote.