Who's Been Eating my Beans?

I kept looking out for signs of my first runner bean St George after such a wonderful show of flowers, but they just didn't come... Then upon closer inspection all I could see were little stalks where the pollinated flowers should have been growing little beans.
Just this one baby bean is visible. Now who could be eating my beans? Slugs? Snails? Birds? Mice? Does anyone have any ideas?
Better news elsewhere. Here are my very first tomatoes of the year. These are Sungold tomatoes grown in the greenhouse. They tasted fantastic, the long tomato gap is finally over!
Courgettes are really going well, left to right, Defender, Black Forest, Soleil. Picked, photographed, steamed and eaten all within 10 minutes! Yum!