I'd go Tolleshunt Major, Tolleshunt Darcy, Maldon (steep hill on the way in - turn right at the top of the hill by the church), Hazeleigh (turning left a mile out of town), Bicknacre, East Hanningfield, Stock, turning right on Honeypot Lane), Padhams Green, Mountnessing, Brentwood, Nags Hill, Harold Hill, past Gidea Park rail station, Romford, and on to Stratford - give the Bow flyover a go if you're feeling athletic, and check the view to your right, Aldgate, follow signs to Westminster, go down the Embankment with the river on your left, and turn left at Lambeth Bridge, turn right at the roundabout, and there you are.....