I realize it's sometimes hard to tell on UK maps how long it will actually take to drive somewhere, but Croydon High is due east of Epsom, and doesn't look to be as far as 45 minutes. However, I do speculate that all these small contextual details are factors in this case: IMO there's something very particular about the circumstances.
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Oooh...I'm looking at "directions", and the fastest Google method is 38 minutes one way. And there's no train, correct, because the rail lines radiate from London and don't go horizontal?