In the world of distance the good old London Bus is a handy yardstick that is used and appreciated by many. Sometimes though this may be a bit small so the length of the River Thames may be more relevant. This handy 'Bus-o-meter' utility calculates your distance in terms of the length of various objects and features including buses and rivers. As with all the SizeOfWales utilities it chooses the feature in it's (small) database that is the nearest to a whole-number multiple of your input distance!