Unite the union will announce today whether it will bring six UK airports to a standstill later this month, causing chaos for hundreds of thousands of holidaymakers.

The union has called on more than 6,000 workers at all BAA-owned airports to vote in favour of strike action in a dispute over pay.

Prime Minister David Cameron promised to have a new tourism strategy in place by the end of the year in a speech in London's Hyde Park today.

He said he wanted to increase the amount raised by tourism, Britain's third largest industry.

"Tourism presents a huge economic opportunity," he said. "Not just bringing business to Britain but right across Britain driving new growth in the regions and helping to deliver the rebalancing of our national economy that is so desperately needed."