Rohullah did a fantastic job, he tested the gas meter for leaks, moved onto the Worcestershire bosch boiler (green star), released air, identified issue with the divert valve, central heating would not kick in, replaced the valve and it started working again. I put the advert up yesterday, he responded back immediately, especially during the Christmas period he travelled 30+ kilometres. Overall, he was very precise, step by step testing, and remediated the issues. Now I have a working combi boiler and certification for boiler and cooker. Thanks for the great experience. Thanks