The most interesting sartorial development of the past week did not happen on the catwalks of New York. Sincerest apologies to the designers who have shown thus far but Tom Ford has stolen your thunder. The taut and entrancing teaser trailer for his directorial debut, A Single Man is as grand a fashion moment as anything were likely to see unfold during fashion week. Based on Christopher Isherwood’s tale about a gay college professor coping with the death of his partner – the film (or the little taste of it rather) is haunting, sumptuous and filled to the brim with pitch perfect costumes. Each detail is just so – from Julianne Moore’s black on white evening gown to Firth’s reading glasses, there isn’t a single stitch out of place. This is exactly the kind of exactness we once expected from Ford’s collections and as he moves into this new arena it appears he hasn’t forgotten his gift for precision.