I’ve passed this noticeboard many times and never stopped to read it. It’s situated at the entrance to Bengal Court just off Birchin Lane in the City of London.
It wasn’t until I actually took the time to stop that I realised it’s a spoof sign. Firstly, the court is so narrow you’d never get a car into it, and it definitely doesn’t run into a Goods Yard. The official looking plate at the top is from a piece of Marine machinery, possibly an engine produced by the firm of J F Spencer. As for the pigeons, well the court is for the most part covered, so any pigeon wishing to gain access would have to walk in and in all the times I’ve passed by I’ve never even seen a single one.