On 2017-03-15 12:06:28 +0000, Roland Perry said:

To avoid you guessing that your chosen station would have one, turning
up, and finding it doesn't.

Or that it has a machine that isn't online, e.g. the Merseyrail ones.
Making you select ensures you have reviewed the list and chosen a
sensible one.

Neil
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Neil Williams
Put my first name before the @ to reply.