Common signs include flickering or dimming lights, burning smells from outlets or switches, buzzing sounds from outlets, frequently tripping circuit breakers or blown fuses, hot or discoloured outlets/switches, and minor electric shocks.

Some minor electrical work, like replacing an existing socket or light fitting with a like-for-like replacement, is generally permitted. However, “notifiable work” (such as installing new circuits, replacing a consumer unit, or any work in a bathroom or outdoors) must comply with Part P of the Building Regulations and should be carried out by a registered electrician or notified to local authority Building Control.

A fuse box uses fuses that need to be replaced after an overload. A modern consumer unit (also known as a fuse board or circuit breaker box) uses circuit breakers that can be easily reset. Consumer units offer superior protection against overloads and short circuits, often including RCDs for added safety.

An RCD (Residual Current Device) is a life-saving safety device that automatically switches off the electricity if it detects a fault, such as current flowing down an unintended path (e.g., through a person). They protect against electric shock and reduce the risk of electrical fires. Modern consumer units typically have RCD protection on most circuits.

Always use an electrician registered with a Government-approved scheme, such as NICEIC, ELECSA, or Part P. You can use the “Registered Competent Person Electrical” search facility online to find registered electricians in your area. Always ask for proof of their qualifications, insurance, and references.

Costs vary based on the job, electrician’s rates, and location. For example, a socket replacement might be £25-£80, a light fixture installation £40-£120, and a consumer unit upgrade £450-£800. Full rewires can range from £1,500 to £10,000 or more, depending on the property size and complexity.