So here we are in the summer and the current list is:
Westbourne and Stoke High (both in Suffolk), Grange Technology College (Bradford), Mirfield Grammar (Kirklees), Boroughbridge (North Yorkshire) and Walkwood Middle School (Worcestershire)
It's really pleasing to see all the press bashing the latter for it's ban for nine year olds. As far as I know, school uniform is not legally enforceable on under elevens.
Moving in the other direction we have Brunts (Nottinghamshire), Kirkbie Kendal (Cumbria) and Martin High School (Leicestershire)