All gas appliances need to be inspected every 12 months by a suitable qualified and registered gas fitter and the landlord should obtain and give you a copy of a Landlord's Gas Safety Certificate.
The relevant legislation is the Gas Safety (installation and use) Regulation 1998, which is enforced by the Health and Safety Executive. You can contact this office or the Health and Safety Executive for further information.
The electrical system does not require a similar check, however it does need to be maintained in safe, good working order and we would advise landlords to have a full inspection carried out periodically, particularly when a fault has been reported or work has been carried out on the system.
The landlord should also check that the furniture complies with the soft furnishing regulations and that any electrical portable appliances supplied with the property to a new or existing tenant have been checked for electrical safety. This includes items such as refrigerators and washing machines. Further information is available from Trading Standards who enforce the relevant legislation.