Bristol Rectum

I was in Bristol on Sunday.Drove down from Clifton,towards the river.Stopped at traffic lights,under the suspension bridge.On the opposite river bank saw the strangest thing.
The word RECTUM,spelt out in letters may be 3 metres high,and made from what looked like rubbish placed in wire cages.Couldn't stop to take piccy.
Do we have a correspondent in the area who could tell me more? Was it art? a student prank? the five pints of Guiness the night before?
This is not the first occasion where southerners didn't know what their rectum was there for!

Has anyone else had the misfortune to visit Brighton?

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