While many will save an average of £300, Martin explained viewers can save as much as £100 a month.
He said: “It’s worth checking, as savings can be huge like Gary who emailed ‘We changed from British Gas to British Gas and saved £100 per month – reduced from £375 per month to £275 per month.
“In addition, I received free boiler, drainage and electrical cover. The drain blocked within our boundary last week and we utilised this and only had to pay the £60 excess. An added bonus to switching. Thank you.’
“So, for existing customers it’s a no-brainer – it’s the same gas, same electricity, same safety and for British Gas customers, the same service.”