What birds eat poppy seeds?

I have a somewhat strange question to ask. My friend is co-writing a television series at the moment, and part of it involves a field full of poppies. He would like to know what birds - if any - would be likely to eat the seeds from poppies - actually from the plant itself, and not just put out as feed in gardens.

It is set in Britain, and needs to be fairly accurate.  I haven't got a clue, so I said I'd find out for him - can anybody help me?

 

Thank you all in advance!

Regards,

Anna :)