Well this is odd. I too have had digging in a couple of my beds and half of my radish and some lettuce seedlings were lost. I thought at first cats but not quite enough disturbance and no mess left behind. Too much damage for birds who have indeed been taking compost from around the broad beans and leaving the usual tell-tale scatter of compost around the beds. The radishes had plastic mesh over so I’m thinking a mouse, or rats?
Eliza