This will depend on the issue. However, many plumbers are also Gas Safe Registered, meaning they can undertake work on all aspects of boilers and central heating systems. It's best to look out for plumbers that display the badge of your boiler on their literature.
Rhosgoch
Rhosgoch is a little town in the north of the island of Anglesey, Wales, concerning 3.5 miles (5.6 km) to the south-west of Amlwch. A short range to the west of the town is the small lake Llyn Hafodol as well as a mile to the south is Anglesey's biggest body of water the tank Llyn Alaw (Water Lily Lake). The town when had a station on the Anglesey Central Railway. Although the tracks still exist, no train has worked on them given that 1993. Additionally linked to the train, was a short south-west dealing with spur that resulted in an oil terminal. This was connected to a floating dock in the sea off of Amlwch, where super-tankers could dock in all tides and also feed oil through Rhosgoch as well as a pipeline to Stanlow oil refinery. This operation lasted for 16 years in between 1974 and 1990. The very first tornado of the record-breaking 1981 United Kingdom tornado episode, an F1/T2 tornado, touched down close to Rhosgoch at around 10:19 local time on 23 November 1981.