Winter is fast approaching and soon more of us will want to turn on the heating as temperatures fall.

With sky-high energy prices, many will be looking for ways to save on costs, which are likely to be double compared to the last year's bills.

According to Money Saving Expert Martin Lewis, there are several ways to cut down outgoings by making some simple adjustments.

Here are seven ways to keep warm while saving on costs.

1. Cut £100 in gas bills

Many gas combi boilers have flow rates - the temperature of water circulating the system - set higher than necessary as default.

Turning the temperature down to 60C will help it run more efficiently, cutting carbon emissions and saving 9pc on your bill.

Find out more by visiting the Money Saving Boiler Challenge website here. 

2. Is your fridge or freezer too cold?

Fridges should be set at 5C and freezers at -18C, according to Mr Lewis.

If the appliances are colder than this, you are wasting money and energy.

3. Take the one-degree challenge

The World Health Organisation say setting your heating at 18C is fine for healthy adults but should be slightly higher for older people and the very young.

But many set the dial to 20C or more.

Dropping your thermostat by one degree or more and wearing extra layers could cut up to 10pc off your heating bill.

4. Hunt for draughts

Turn detective and inspect your windows and doors for draughts.

Blocking these gaps is one of the cheapest and most effective ways of saving on energy costs, according to the Money Saving Expert.

5. Reflect the heat from radiators

Putting sheets of reflective material behind radiators on external walls can help stop the heating escape, maximising the warmth in the room.

Tin foil can also work although not as effectively.

6. Turn the knob on your radiator

If you are not using a room then don't be afraid to turn down the radiator valve.

"Control the rooms you heat so you're not wasting cash overheating empty spaces," said Mr Lewis.

7. Switch the oven for the microwave or air fryer

Cooking small dishes in the microwave or using an air fryer can be a much cheaper and more efficient way to cook food.

According to Money Saving Expert, heating a jacket potato in the microwave is up to 80pc cheaper than in an oven. 

But if you are cooking a roast dinner, opt for cooking it all in the oven.