Extension leads are one of the most commonly used electrical accessories in UK homes. From powering TVs and gaming consoles to charging multiple devices at once, they are extremely handy. However, not all extension leads are created equal, and choosing the wrong one can be a fire hazard.

This guide walks you through everything you need to know when buying a safe and suitable extension lead in the UK.

Why choosing the right extension lead matters

Using an extension lead might seem like a simple fix for a lack of sockets, but misuse or poor-quality products can lead to overheating, electric shocks, or even house fires. UK safety bodies like Electrical Safety First and Trading Standards regularly warn against cheap or unsafe extension leads, so it is important to know what to look for.

1. Plug type and British Standards

Make sure the lead is made for the UK and complies with British safety rules. Check for BS 1363 marking (the British Standard for plugs and sockets), a UK 3-pin 13A plug, and the correct fuse (usually 13A or 10A). Products without this marking may be imports not built for UK power systems.

2. Number of sockets

Leads come with 2, 4 or 6 sockets. Do not choose more than you need, and avoid plugging heavy appliances like kettles, toasters or heaters into an extension lead, these should go directly into a wall socket.

3. Cable length

Leads range from about 1 to 10 metres. Use the shortest cable necessary to avoid trip hazards and voltage drop, and never use a cable reel while it is still wound, it can overheat quickly. Always fully unwind a reel before use.

4. Surge protection

If you are plugging in valuable electronics like computers, TVs, routers or consoles, choose a lead with built-in surge protection. It protects devices from voltage spikes; look for a Surge Protected label and a higher joule rating.

5. Power rating and load capacity

Each lead has a maximum rating, often 13A or 3,000W. Overloading is one of the most common causes of electrical fires. Add up the wattage of everything you plan to plug in and keep it well below the maximum. A laptop (100W) plus TV (200W) plus phone charger (10W) totals 310W and is safe; a heater (2,000W) plus toaster (800W) is already close to the limit.

6. Flat vs tower extensions

Flat leads are easy to store and sit behind furniture or wall-mounted TVs. Tower-style extensions stand vertically to save space and often add USB ports and per-socket switches, ideal for desks and small rooms.

7. Extra features to consider

Useful extras include USB ports for charging phones and tablets, individual switches for each socket, LED power/surge indicators, and child safety shutters. Choose features for your needs, but never let extras distract from the safety basics.

8. Common mistakes to avoid

Never daisy-chain one extension into another; only use IP-rated, outdoor-safe leads outside; do not run cables under carpets or rugs; and never use a lead while it is still coiled.

Final thoughts

A good extension lead is a practical addition to any UK home, but it must be chosen with care. Look for UK standards, avoid overloading, and choose surge protection for valuable devices. If in doubt, spend a little more on a trusted brand rather than risk a cheap model.