Hi jg96, Prices vary up and down the country and especially if you are inside the M25. I would be looking on the trust CORGI web site, and in the find an installer section enter you're post code and what work is required. If you can avoid using engineers who are having to travel a fair distance then the charges will be minimal. I charge a standard fee of �45 plus the cost of the parts ( 1x4ft flexible cooker hose = �10. + 1 x Safety Chain,parrot clip and eye bolt = �5 and the cost of registering it with CORGI �5. So all in all in my area West Yorkshire ( Leeds,Wakefield ). I would be charging in total �65 + VAT ( or �60 for cash wink wink )....