The company announced it would slash residential gas prices by up to 16.5 per cent while electricity costs would fall by up to six per cent for the average household.

Scheduled to come into effect on June 15th, these cuts will slim down the average customer bill by £75 a year to just £836, the company claimed.

But uSwitch.com condemned ScottishPower for introducing selective price cuts which would not impact equally on all it customers.

While direct debit customers would benefit, those who pay by cheque or cash are left out in the cold, the price comparison site claims, with just five per cent cheaper gas and no change to electricity bills.

ScottishPower’s announcement followed hot on the heels of a price cut from rival EDF Energy, the only other supplier to be denounced by Ofgem last week.

The slower-moving suppliers were spurred into action by a second round of price cuts from market leader British Gas.

Now that every major supplier has unveiled price cuts and put their cards on the table, now is a good time to switch, advised SimplySwitch.com.

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