Last week a long-disused railway signal had become repainted in-situ overnight by persons unknown. It's the 40th anniversary of it's closure so they assume it was an enthusiast. Pic here:

http://www.newsprints.co.uk/portsmouth/order.cfm?photo_id=327064&pt=n

The route was the "Hayling Billy" which was on Hayling Island near Portsmouth.

Gareth