For maximum versatility, choose a single-breasted two-button suit in navy or charcoal grey. Avoid anything shiny — it looks cheap. Fit is paramount, so factor in an extra £50-£70 for alterations (try Pinnas & Needles, 51 Lexington Street, W1). For value, you can’t beat Reiss (from £249), though Hammond & Co by Patrick Grant at Debenhams (from £249) is worth a look. Up a level, I’m impressed by Tommy Tailored, the revamped suiting from Hilfiger (from £395), and Hackett (above, from £525), which has just opened an impressive new flagship on Regent Street.