I have looked through Phillips wild flower book which is arranged in date order and found only two, both very rare, so sadly the answer seems to be unlikely to find any.

Thanks Steragram I looked this up in the one and only Wild Flower book that I have, and I came up with nothing... I tried a google search too! I just wondered if anyone on GoY would be able to help... I'm researching this for a Wedding that I'm doing very early in September! Thanks for your help though... :o)

There will probably be the odd straggler here and there but nothing grand enough or reliable enough for a wedding.
Usually safer to stick with a florist!

If you are looking for flowers for a wedding don't rely on wild flowers being in bloom at the right time!

Thanks - to you both.