Complex sentence: Stand-alone sites were sold to Mitchells & Butlers in 2006.and were refurbished to brands such as Crown Carveries, Toby Carvery, Harvester and Vintage Inns.
Split into simpler sentences: Stand-alone sites were sold to Mitchells & Butlers in 2006. These sites were then refurbished to Mitchells & Butlers' own brands such as Crown Carveries, Toby Carvery, Harvester and Vintage Inns.