Don't let roaming charges cast a cloud over your Olympics

The Olympic Torch has now arrived in London... as have an additional few million people from across the globe.

While the eyes of the world will focus on the Olympic Stadium over the next few hours, days and weeks, the millions of people coming to the UK are likely to be having at least one eye on their roaming charges.

For the first time in Olympic history, mobile phones are going to be used as key tools to keep up to date with events, to watch, to tweet, to upload photos and this means data, data and more data. In fact, in just the Olympic Park, BT expects to see peak traffic hitting 1.7GB of data across it's Wifi network every second.

With London becoming a mass of Wifi and mobile network signals, ensuring that everybody is on the most cost effective network is not going to be easy.

Thankfully, the EU regulations came just in time, but for those who arrived from non-EU countries this could be a very expensive few weeks.

Our advice is, if you haven't already agreed special rates with your operator, either seek a second SIM or ensure you're using one of London's many Wifi spots.