Like-for-like sales in the core MFI chain plunged 12.7% in the 24 weeks to 12 June, taking sales across the group down 0.7%. Pre-tax profits fell to £32.1m from £59.3m a year ago. Only Howden Joinery, MFI's fast-growing supplier to the trade market, saved the group from an even worse showing. Sales in the division rose nearly 26% to £227m.