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WATCH: Zoe Salmon And Matt Edmonson's Secret Rendezvous On The Roof Of The O2 Arena #GotTUGo

Presenters Zoe Salmon and Matt Edmonson have been tasked by O2 to put their TU Go app through its paces. Over the next week we're going to set Matt and Zoe a series of challenges using the TU Go app - a revolutionary app that allows you to make calls when there is no signal.

The challenges are set to happen in and around London on 28th, 29th and 30th August.

To find out how you can get involved, keep an eye on #GotTUGo

Meanwhile, discover what happened when Matt and Zoe first met on top of the O2 Arena...