Isn't it a Leucanthemum superba???

Thanks Spritzhenry, that looks right. Just planting out a new garden and I am trying to name things that I have bought in little markets, dug up from friends gardens (they don't know the name either) inherited from old gardens and all sorts. It is a bit of a puzzle sometimes as sometimes the flower looks right but the leaves don't etc.....

You're welcome. I got the latin ending wrong..should say 'suberbum'. Sorry. :-((

Do ask us some more - we like ID-ing plants!