Best Electric Blankets UK (2026): Top 5 We'd Buy

An electric underblanket (electric blanket in UK bed language) sits on the mattress under your sheet and pre-warms the bed. A heated throw goes over you on the sofa or bed for lounge use. Underblankets use straps or skirts; throws are portable overblankets. TopMagpie covers throws separately — do not buy a throw ASIN when you need a fitted bed warmer.

Usually not compared with central heating. Many UK underblankets claim roughly 1–3p per hour on mid settings depending on wattage and your unit rate — manufacturers often cite Silentnight singles around ~70 W (~2p/hour at typical rates). Heat the person in bed, not the whole flat. Check the wattage on your listing and multiply by your p/kWh for a precise figure.

If two people share a bed and prefer different warmth, yes — dual control is the main reason to buy a king/double underblanket with two controllers (like Silentnight Dual Control or Dreamland Scandi Sherpa). Single-zone blankets (Slumberdown Sleepy Nights, Beurer TS15, Silentnight Comfort Control Single) suit solo sleepers or couples who agree on one setting.

Yes — if the controller detaches. Unplug, remove all controllers, then machine-wash on the temperature the care label allows (often 30°C or 40°C). Ensure the blanket is fully dry before reconnecting. Never wash the controller. Dreamland Scandi models also allow tumble-drying when the controller is off; check your specific ASIN.

Follow your model’s instructions. Many UK underblankets are designed for pre-heat then low overnight use, while others expect you to switch off before sleep. All picks here include overheat protection; Dreamland adds 1/3/9-hour timers. Never fold, bunch or crease a powered blanket, and replace any unit with damaged wiring or a faulty controller.

Both aim to stop the underblanket shifting. Straps (Silentnight, Slumberdown, Dreamland corner straps) hook under the mattress corners. Skirt-style fitted blankets wrap the mattress sides — less common in our Amazon UK shortlist. Match strap depth to your mattress (Slumberdown quotes up to ~30 cm). Deep pillow-top mattresses may need you to check buyer fit notes before buying.

Buy the size that matches your mattress: single (~135 × 72 cm), double (~135 × 120 cm) or king (~150–200 cm wide depending on brand). Our #1 Silentnight Dual Control King is 160 × 150 cm; Dreamland Scandi King is 200 × 150 cm. An underblanket should lie flat with margins away from the bed edge — do not let it hang over the sides while powered.

Reputable UK models include overheat protection and many carry BEAB approval (Slumberdown Sleepy Nights). Replace old or damaged blankets — if yours has fabric wear, exposed wires or a loose controller, stop using it. Never use a folded or creased blanket while switched on, and always detach controllers before washing.

By warming the bed directly you can often keep the thermostat lower overnight or pre-heat the mattress instead of heating the whole bedroom for hours. Pair with draught-proofing so warm air is not leaking under doors. A heated throw on the sofa covers lounge use; this guide is for bed underblankets only.

For singles, the Silentnight Comfort Control Single is our budget pick with a huge UK review base. For doubles, the Beurer TS15 Ecologic+ or Slumberdown Sleepy Nights usually sit in the lowest price bands while still offering recognised safety features.

Buy the size that matches your mattress footprint. Oversizing can leave excess fabric at the edges — manufacturers warn against powered overhang. Undersizing leaves cold zones at the feet or sides. Couples on king beds should choose an explicit king listing with dual control if you need split heat.