221113 takes the sharp curve just west of Chester having emerged from a short tunnel working Avanti's 16.10 Euston to Bangor service. I am standing on Chester city wall that was cut through by the Victorians when the railways arrived in the city. Just to my left is the impressive Medievil Bonewaldesthorne's Tower which is a historic part of the city wall circuit, see....
https://en.wikipedia.org/wiki/Bonewaldesthorne%27s_Tower