It's not sainfoin is it? I can't quite tell from the photo but I had a similar issue trying to identify this recently and it turned out to be that...

Thanks for the thought DW - but, several other people, having seen it in the flesh, say it is definitely an orchid. Hybridised propbably, it seems.

Sainfoin, however, might be a good plant to grow int he meadow, so I shall source some seeds somewhere, thanks.