We used them recently for our property in NW London, they gave us a cost of £85 for every half hour. When they arrived mentioned that they think the APS needed replacing, I said ok then he said he did not have so needed to leave to buy from Greenford. He then disappeared for 1 hour 30 mins (£255) only to replace the part & say old boiler and it needed replacing for £2850 which I recently got done by a local company for £1350,

This company is a complete rip off, use at your peril.