I don't really want to have to buy something new (well, I do, but I can't really afford it) so will any of these suffice?
It's a marquee country wedding and it's been described as 'a festival rather than a wedding' and specified as not black tie. The groom will be wearing tweed. DP and his brother will both be in navy suits as its all they've got, and BIL's girlfriend will be wearing a mid length cream dress she's just worn as a BM, so quite dressy. Others are going more casual. I really wanted to wear a midi tulle skirt but again, money.