Saturday 8th November 2025, 12.15pm (day 5,189)
Before embarking on its final spread into its estuary, between Widnes (on the north bank) and Runcorn, the River Mersey narrows significantly. This convenient crossing point, known as the Runcorn Gap, has been exploited for hundreds of years, but it was only in 1961 that a proper road bridge was opened, and given the ‘Silver Jubilee’ name 15 years later. And, well, here it is, seen from the Widnes side. The second longest bridge I have walked across as part of my little walking project (after the Humber Bridge). Pedestrians take a rather exposed and vertiginous walkway that dangles off the main arch to the left, by the way.
Being 42 
Sydney Harbour Bridge is the same type as this, and longer by a few inches I seem to remember