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Today I finally get to show you my maddest mission to date. A daring raid on a city of 9 million people, 32 vertical miles and countless tall spiky fences. It's Birmingham times 10, and I honestly didn't know if it would be possible going in. A few miles in I was even less sure. But I kept going, and the results are both thrilling and hilarious. Fasten your seatbelts and get ready for the ultimate urban adventure. A tale of endurance, stealth, stress management, but above all conquering fears.

This unhinged urban adventure continues with part 2 of 3, and we’re about to enter the beating heart of the city. Things have already been trickier and slower than expected up until this point, but with fence riddled schools, apartment complexes, and construction sites standing between me and the Thames, there can be no dilly-dallying. Can I smash my way through it all? Or will a series of unexpected obstacles in Canary Wharf spell the end?

My most ambitious/mental urban adventure to date draws to a reluctant close, but I've saved all the best content till last. My ticket to the southern edge of Greater London is now via the Ravensbourne river, a fascinating but sometimes filthy semi-subterranean tributary of the Thames. My decision to leave it temporarily results in one of the most exhausting shortcuts ever taken, and a subtle flaw in my route late on that leads to one of the most wretched ordeals me or my uncle Ed have ever experienced. Will we make it out of the sewers and complete the mission with no deviations? or will my luck finally run out...