Andy Burnham was accused of launching another raid on struggling families last night after he approved a new holiday tax.The Prime Minister gave his favoured regional mayors the power to impose an unlimited 'overnight visitor levy' on stays in hotels, B&Bs and holiday lets in England.And despite objections, Mr Burnham ruled that the tax would be a percentage of accommodation charges rather than a flat fee and would not be capped, with Labour-run areas likely to set it at 5 per cent.Business groups described the move as a 'kick in the teeth' that would put tens of thousands of jobs at risk while costing holidaymakers an estimated £1.6billion by the end of the decade.Shadow Chancellor Andrew Griffith told the Daily Mail: 'Just days ago, Andy Burnham said his was a "cost of living Government". Now he is launching another tax raid on hardworking families.'His tourism tax will hammer the hospitality industry – which has already taken a beating from Labour's business rates hikes, jobs tax and employment red tape – driving up the cost of the family holiday and discouraging people from holidaying in the UK. The Government's own consultation shows people don't want this tax. But Labour want more money to pay for more benefits.'According to Oxford Economics figures cited by UK Hospitality, assuming the impact of a 5 per cent levy is fully realised by 2030, the impact on the economy and consumers would be stark.Despite Labour's mayors raking in millions to fill town-hall coffers, Oxford Economics believe the move would see a reduction in tax receipts for the Treasury of around £688million, a loss of £101million in direct investment from hospitality and tourism businesses, 11.9million fewer nights spent in accommodation and 33,000 jobs lost thanks to an overall £1.8billion cut in tourism spending.