Hi Gill in Bath. Yes I eventually solved it. Douglas meadow foam? Interesting but I'm guessing those eggs don't come with a Tesco date stamp. I asked around and it seems there is a bonkers middle aged woman nearby who feeds foxes fresh raw hens eggs. Foxes know it's a major protein hit and so look for a larder to bury them for when times get hard. Whatever you think about foxes, feeding wild animals is generally wrong. Canadians don't toss out burgers to feed the bears, nor does anyone with their marbles leave out cereal for the rats. I just figured this lady was lonely or mad or perhaps just misguided. This being the EDF , a million swivel eyed loons will no doubt ckme on to say I'm wrong.