it's not fair on people who are desperate to use a toilet to have to scramble around for change. I often need to use the loo after a long coach journey.
Coaches tend to have toilets these day don't they? But why would you be in at a London terminus station if you've just got off a coach? Coaches stop at Victoria Coach station, which presumably has its onw facilities.
Many people have medical conditions which make it necessary for frequent loo visits and it's not fair to charge them every time. Costs of running these loos should be absorbed by the already exorbitant tickets prices.
So why can't those people use a Radar key....?