No. You must never repair your own boiler – only a Gas Safe-registered engineer can do any work on your boiler. You can do simple DIY tasks to repressurise your boiler or stop a leak, but if you have to remove the outer casing of the boiler or touch the flue then you must get a qualified boiler engineer to take a look at your central heating system.
Thatcham is actually a town in the ceremonial county of Berkshire, England. It's located 3 miles east of Newbury and 15 miles west of Reading. Often deemed as UK's oldest town, Thatcham has a population of 23,000 people. This number is continuing to grow rapidly during the last few decades from 5,000 within 1951 and 7,500 in 1961.