British Gas are expensive but their staff probably receive less for the job, what you do get is a massive company with many different people who can back the work up if you have problems. Not worth it in my opinion. Try to nurse it through to the spring and you'll find loads of decent gas safe plumbers ready to fit it for a decent price. Try and even get a quote at the moment and you'll get loads of grumpy plumbers trying to skin you alive.
British Gas are expensive but their staff probably receive less for the job, what you do get is a massive company with many different people who can back the work up if you have problems. Not worth it in my opinion. Try to nurse it through to the spring and you'll find loads of decent gas safe plumbers ready to fit it for a decent price. Try and even get a quote at the moment and you'll get loads of grumpy plumbers trying to skin you alive.