• Swindon is much closer to Avebury so will be better for trains. Also First Great Western still run guards carriages on most trains to London which is a far better option for bikes. The trains are more frequent and, I think, a little faster. You can leave at 5.23 and be in Paddington by 6.24. Plenty of time to ride across London to Waterloo before the Salisbury train arrives.

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