SURELY David Cameron must realise that, should energy companies agree to his proposal of a four-tariff programme, this in itself will not achieve what customers really need and that is cheaper energy?

These companies will merely juggle their costs within the range of their budgeted profit estimates and come up with tariff bands which will return the same end-of-financial-year profits.

Instead of four tariffs, why not just one?

This would be a base unit cost to which these energy companies could apply varying discounts for high users, direct debit and dual fuel customers, etc.

Just think how easy it would be to switch suppliers should a single unit cost be the comparison factor.

Bill Bevan, Eastfield Crescent, York.