They were called Mojito, they looked like this and I found them barking mad but strangely fascinating.
So I found myself near Schuh on Oxford St today sans DCs and suddenly remembered them. They had one in my size, so I slipped it on and ....... ..... they were great. Striking, flattering, stable and solid as a rock. BUT, because they're made of rigid (leather lined) composite they have not one nanometer of give in them, and my arches are too high to fit comfortably into the centre section 
.
Just as well really because I've got a "dress to drop jaws" wedding to attend next month, and if they'd fitted I'd have been powerless to resist, which would have been bad because 155 quid is silly money for a gimmicky pair of shoes I'd only wear twice a year .