One of the big benefits of electric boilers is that they do not require annual servicing. There is no legal requirement for a yearly service and safety inspection as there is with gas boilers. Some installation companies do offer servicing packages included as part of the price.
Hertford is actually the county town of Hertfordshire, England, and it is a civil parish within the East Hertfordshire area of the county. Hertfordshire is found in the south of the United Kingdom, bordering other counties including Essex and Cambridgeshire. Greater London is in addition directly to the south.