SUPERMARKETS were warned that a Tory government will call time on cheap super-strength alcohol.

Chris Grayling, the Shadow Home Secretary, vowed to force up the price of potent beers and ciders, but added: "The ordinary pint in the pub will not be affected."

Local councils would also be given tough new powers to stamp down on irresponsible pubs, bars and off-licences – forcing them to prove they do not fuel binge-drinking.

Under the plans, the tax on strong alcohol would be increased so for example:

Alcopops, such as a four-pack of 4.5% WKD, would cost £6.68 – up from £4.20;

A four-pack of 7.5% Diamond White cider would cost £4.38 – up from £3.64;

Mr Grayling, who is also the “Shadow Minister for Liverpool”, said: "Our town centres on a Friday and Saturday night can be battle zones for our police.”

Mr Grayling added: "It’s not about stopping people enjoying a few drinks in the pub – but things have gone far too far."

A Conservative Government would also introduce "instant punishments" for anti-social behaviour, allowing the police to "ground" young offenders for up to a month.