Usually, bus stop tiles are in alphanumeric order (i.e. 1, 12, 51, 108, B11, R5 - in an order similar to this). However, I recently noticed a bus stop in Well Hall where the '161' tile came before the '122' one.
I also noticed a bus stop in Kidbrooke which has the 'B16' tile before the '335' one.
How many more examples of this can be found in London?