Kate Middleton put the name of Issa on the map when she wore one of Daniella Helayel’s designs for the announcement of her engagement. But the collection at London Fashion Week showed that there is so much more to Issa than one blue dress. The collection was a clear homage to the Halston/Studio 54 era of New York, with halter necks, fluid jersey, chain belts and graphic prints all on display. There were gorgeous prints on display in teals and browns, a colour combination I love. Worn with Wallis Simpson style hats, designed by Stephen Jones, that would look fantastic on Kate, and with black opaque tights, the look was…