Steve's in Hornsey Rd, between Thorpedale Rd and Tollington Park. He is actually Stavros, and he is a proper tailor, as well as surprisingly cheap. His specialism is theatre costume and the shop is often full of eccentric opera costumes etc, but over the years he's done a lot of shortening legs and sleeves for me! That said I haven't been in for a year or so, and I think he was passing the business on to his younger partner, who I don't know. But definitely worth a visit.