I noticed these little locks attached to the metal cord on the millennium bridge which spans the river connecting St Paul's & the Tate Modern.
I have noticed collections of these locks at several points throughout the city for example there's a load locked onto the fencing outside of Shoreditch Station.
I think its interesting to read the text on them,,,,, the first photographs was a tribute to a marriage, professionally engraved and rather expensive looking,
the second was simply drawn on using permanent marker and the second was engraved simply with 'DO IT RIGHT'
and the remnants of a former D.A. permanent marker job.