Lighthouse Keeper's Lunch (45th anniversary edition)

Once there was a lighthouse keeper called Mr Grinling... Mr Grinling LOVES his food, but - oh no! - he's not the only onewho likes a snack and the local seagulls have started stealing MrsGrinling's tasty treats...!Can Mr and Mrs Grinling come up with a cunning plan to keep thosepesky seagulls away?