Anyone for tennis and Pigs might fly

Jacqui was on Dartmoor today so I went for a walk to Torquay. I was impressed by the new tennis courts at the Riviera Centre. I walked past the Princess Theatre. The illuminated sign which advertises the current show said simply Pigs Might Fly. Was this disbelief at the overnight resignation or the title of a play for children about a farm by Michael Morpurgo. Captured in extra.