Less than an hour after they left , my new boiler was pouring water out of the base. This 'professional' firm hadn't bothered to connect the vent pipe to the outside drain pipe.
Grossly overpriced on parts, shoddy workmanship - not to be recommended. More...
If you want to be ripped off by paying over double the cost of parts, then use this utterly disreputable firm.
Fast response and very effective