 Later that year, Tarmac and Wimpey announced an asset swap whereby Wimpey acquired all of Tarmac's housing, and in return, Tarmac received Wimpey's construction and minerals divisions.The downsizing continued, and in July 1999, Tarmac demerged its construction and professional services businesses under the name Carillion.Months later, Tarmac, now back to its roots as a roadstone and road surfacing business, accepted a bid from Anglo American Mining.