In the introduction to the UK section in the Smith bus/tram token catalogue, Smith notes something like "most people in the UK never use a transport token all their lives yet there are hundreds" (this is paraphrased as I don't have the book in front of me). This thread is a shining example of the correctness of that statement. I grew up in South Staffordshire (in Kinver, to be precise, at the very bottom of the blue area highlighted by andyg) and lived there for 18 years, 16 of which under the age of 18 and therefore qualifying for concessionary travel, and I never saw anything like this in use. I used the bus regularly and never paid for the fare using anything other than standard coin of the realm. The fare was 37p from Kinver to Stourbridge or vice versa and the drivers didn't give change, so there was a constant fight to get the right combinations of coins - buying tokens in advance, say 10 for £3.70, would have been an eminently sensible solution in the pre-electronic era, but it was AFAIK never or rarely implemented in the UK, unlike in the US or Sweden.