What am I?

I found this today in a scruffy copse on my customer's farm and have no idea what it is. This is the only one with a bud. The bud looks very similar to a grape hyacinth but the leaf doesn't.

We did some good jobs today, the gravel paths and peony borders are weed free, roses pruned, grass cut etc.

Lovely meal from this evening from 'Cook' and lovely company, thank you.