Christopher Kane...I can honestly say (vintage clothing aside) I have rarely seen anything interesting done with gingham but he managed to make it work here with out making the models look like they were sporting table cloths or off to a picnic.
*honorable mentions* check out these (slightly) lesser known designers of London FW:
Duro Olowu (fabulously loud prints)
Mark Fast (form-fitted cobweb knit dresses - a la suzie bubble)
Loise Gray (more prints and deconstructed dresses)
*all runway shots from: style.com