I took the train into Manchester on Saturday – the main reason being that I’d decided to look for some new walking boots. It was a fine sunny, day and after alighting at Salford Central train station and walking up to Deansgate, I stopped to take a few snaps of the Trinity Bridge, a footbridge that crosses the River Irwell connecting the “twin cities” of Salford and Manchester.

It was designed by the architect, structural engineer and artist, Santiago Calatrava.- it’s his only bridge in the UK – and was opened in 1995.

It’s a cable-stay design with a 41-meter cigar shaped pylon, angled towards Salford, with the cables attached asymmetrically to form a cris-cross effect– rather reminding me of a “Spirograph” pattern.

It’s difficult to take a photo that properly shows the design. On the Salford side there are three ramps, two of which curve in from either…