Kate Middleton attended a Service of Thanksgiving at Westminster Abbey wearing an Alessandra Rich white polka dot dress. Shop ...

Marks & Spencer has dropped a chic strapless polka dot dress that's gone viral on Instagram and I think Kate Middleton would love it. Shop the look for £79 at M&S.

Polka dots are making a serious comeback this season – and M&S has dropped the perfect £45 dress to ride the trend.