Whittlesey rd is on the west side of march and heads, not suprisingly to whittlesey. I've ridden a bit in this area as i have friends in Ely. These aren't ditches like you'd see over here. some are more like small canals. That road is surrounded by flat open fenland. It is also very straight and fast in sections. It's not a main road so wouldn't think there would be many vehicles on it. Have a look on street view. if you lost contol on it your goin in the ditch. Other than scrape marks i can understand why he wasn't found. i can also understand why he used it.