The common post-Christmas mistake that’s costing Brits £380 EVERY year & means you’re having to hike the heating more

AN EXPERT has issued a stark warning to Brits about a common post-holiday mistake that could cost you hundreds every year.

Unless you’re still in the festive spirit and like to keep the decorations up until January 6th, you’ve already started to put tinsel and baubles away.

GettyAs many are starting to put tinsel and fairy lights away, an expert has issued a stark warning to Britons about a common mistake that could cost you thousands over time[/caption]

However, you need...