Another brick in the wall...

As I walked to work this mornng, a brick wall with caught my eye. A few of them had been eroded, while others were covered in lichen.

Fortunately at lunchtime the sun came out so I nipped off to take a few blips of the wall. I thought that this heavily eroded brick would make a good study for today's photo - the impact of the elements and pollution probably have a lot to answer for.