On Tue, 28 Jul 2015 19:59:28 +0100, "Phil L"
wrote:

I think they are bluebells, spanish ones probably.
I've already got a handfull of these in my garden and not keen on having
more.

My immediate thought was Spanish bluebell. If you have even one in
your garden you will soon have more! I have battled with them
unsuccessfully!