I go to the shops in London sometimes even on a weekly basis.
It's very hit and miss at them all depending who you get.
I personally hate Bloch the most.
However, dancia is pretty good especially if you get emma or an American girl I can't remember her name...
Capezio have a few great fitters and capezio pointe shoes are a lot better than they used to be. Capezio also stock Suffolk brand but only selected styles such as spotlight, solo, ensemble.
Freed are hit and miss for me. They seem to always want to put my tapered toes into a square box shoe! They even sold me a shoe that was completely not right for me. Plus I find freed off the rack styles break down faster.
Sansha are quite good and stock kh Martin, capulet and other brands aswell as sansha. Small shop but sometimes great fitters.