Watchdog vows to tackle 'bill shock'

PA

The post-holiday blues could get worse if you discover you racked up a huge mobile phone bill whilst sipping cocktails by the pool. Britain's telecoms watchdog Ofcom has vowed to tackle the "bill shock" suffered by many people.

The regulator believes UK mobile phone companies should do more to prevent this happening. It threatened "mandatory" action if the industry does not play ball. While it's making all the right noises, what can you do to make sure you're not running up huge mobile bills?