Fen Lane in North #Ockendon near #Upminster -this point is the most Eastern part of Greater #London - 3,5 km away from the #M25 #motorway (which is not the exact border of Greater London!). Beyond this point you have crossed into #Thurrock #Essex (and are imediately greeted with a sign from the #Police warning that #ANPR cameras are in operation) #UK #Roads #Transport #Geography