Grab a pastry-to-go from Pavilion in Victoria Park and hit the road. This route takes you straight up through Epping Forest for direct escape from London. Crossing the M25, you'll trade the A roads for country lanes and begin to weave your way through Essex.
There's a late lunch stop on the route at Bicicletta, or try one of the many village pubs on the way if you want something more substantial - The Chequers at Matching Green, or the Plough at Debden.
Wylde Sky Brewing open their taproom on Saturdays at 3pm, just 15 km outside Cambridge. Time it right for some refreshment and then ride into Cambridge and over the cycle bridge to finish directly outside the station. Trains run back to Kings Cross and Liverpool St, taking about an hour.