Walk up Caledonian Road. Film Keystone Crescent if you haven’t done so already.
Get to the Regents Canal. Keep going until Richmond Avenue leads right. Take this and then first left.
Thornhill Square is surrounded by Victorian and Edwardian terraces, with neat neo-Georgian rows of houses lining the leafy streets.
At the northern end of the park stands the imposing St. Andrew’s Church.
Walk up Crescent Street. First right here leads to Barnsbury Wood. To Offord Road and then left.
Back on the Caledonian Road. We pass Wheelwright Street and then Pentonville Prison.
Left detour along Market Road to find the former Metropolitan Cattle Market and clock tower.
North Road beyond and right to reach Caledonian Road north of the station.
Caledonian Road station, a Leslie Green station adorned with ox-blood red terracotta, stands on the side of the road much as it has since its opening in 1906, coinciding with the inauguration of the Piccadilly line.
Perhaps, do this in reverse