I don't drive so do a lot of walking (4+ miles the days I work, and 6+ when on the school runs). Winter is fine, I wear a pair of chunky flat leather boots but am struggling with summer footwear - I can do it in flip flops or ballet flats but wear through them very quickly and will probably end up knackering my feet over time if I continue. So any suggestions for stylish but supportive shoes for walking please?