There's a double arrow flag now being flown from a new flagpole at the north entrance of Reading station (operated by Network Rail). I presume it's also another one of Sir Peter's initiatives.I thought of this post when I alighted from the Sleeper this morning and noticed there is a double-arrow flag flying above Euston!
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(image shows a view of the entrance to Euston London Underground station, a red flag with a white British Rail double-arrow sits semi-unfurled on flagpole above)