While the UK is about to see the arrival of autumn, the weather will sadly soon turn to rain and colder temperatures.

This will mean millions of cash-strapped Brits will be considering turning the heating on in their homes for the first time since spring.

Many experts have predicted a generic date, however, as the UK has so many microclimates, this can be a waste of energy and money for Brits.

Mitchell Wray, an energy expert at National Insulation Supplies, has shared an official rule on what weather conditions need to be for Britons to start using their central heating.

He has also shared the exact date when this should take place in each city across the UK.

The experts collected the data from Met Office forecasts, which take into account both historical data and current weather patterns to give a more accurate prediction, to determine when each city will experience its ‘Switch-on’ criteria.

Wray said: “The time to switch your heating on is when the temperature regularly no longer reaches 15 degrees for a period during the day.

"Waiting for it to drop colder could leave problems later in the winter causing costly repair bills, especially if you haven't turned on your boiler or heating for a few months.”

The UK’s ‘Big Central Heating Switch-on’ dates:

Glasgow: 23rd September

Cardiff: 6th October

Newcastle-upon-Tyne: 7th October

Nottingham: 9th October

Hull: 9th October

Stoke-on-Trent: 9th October

Plymouth: 9th October

Leeds: 10th October

Edinburgh: 10th October

Southampton: 10th October

Sheffield: 11th October

Bradford: 11th October

Birmingham: 15th October

Liverpool: 15th October

Manchester: 15th October

Bristol: 19th October

Leicester: 19th October

Coventry: 19th October

London: 20th October

Meanwhile, Wray has also shared top tips for keeping heating bills down.

Seal the deal:

Seal any drafts around windows, doors, and skirting boards. You can use weather stripping or caulk to prevent cold air from entering.

Lower temperature:

Reduce your thermostat by a few degrees. Even a small adjustment can make a significant difference.

Close curtains:

During the day, keep curtains and blinds closed to prevent heat loss.

Regular maintenance:

Ensure your boiler and radiators are clean and functioning efficiently.

Bleed radiators:

Bleed radiators to remove air pockets and ensure they heat evenly.