D'oh!

We have been in this coffee shop dozens of times and I have only just realised that the design of the toilets echoes the design of the control cabin of Newport's iconic Transported Bridge ("Pont Gludo" pronounced "Pont Gleedo" in Welsh).

If you have never seen a Transporter Bridge, and I think the one in Newport is the only remaining working one in the UK, then you should look it up on Wikipedia.