Offices, households and local authorities around the country could see themselves paying much higher energy bills from next month, as a number of dual energy deals are due to expire by the end of September.

According to Go Compare Energy, charges could increase by up to 43 per cent if customers are rolled on the supplier’s variable tariff.

As of September 30th, 15 tariffs will come to an end, resulting in higher bills for nine energy providers. This includes two of the ‘Big Six’ suppliers – EDF Energy and Scottish Power.

Ben Wilson, energy spokesperson at Gocompare.com, noted that as temperatures drop and the dark nights creep in, September becomes the start of the ’thermostat switch-on season’, which results in higher bills anyway.

“Therefore, it’s even more important that energy customers avoid paying over the odds by allowing themselves to be rolled over on to expensive variable tariffs when their fixed deal comes to an end,” he stated.

Those in the Scottish Hydro region who get their gas and electricity from M&S Energy’s Fix & More Sep 16 Paperless Billing deal will see their bills jump the most, increasing by a massive £332.71 on average or 43.59 per cent.

Switching when cheap energy deals come to an end is, therefore, very important and could save customers up to £366 a year on average, according to the price comparison site.

Another way to for businesses and councils to save money on their bills is to swap their conventional bulbs to LED light panels.

Bury is one such location that is undergoing an environmentally friendly transformation, with the installation of 11,000 LED streetlights.

A spokesperson for Bury Council told Bury Times this move will save “at least £200,000 over the coming years” by reducing the amount of electricity usage by a half.