This study is a randomised, double-blind, placebo-controlled study of topical GW870086 to explore the potential for skin thinning in healthy adult volunteers after 42±2 days of treatment. The primary objective of this study is to assess the thickness of the skin using ultrasound. The secondary objectives are to assess skin thinning using a visual scale for skin atrophy and telangiectasia, safety and tolerability of GW870086 and to assess the pharmacokinetics of GW870086 administered as a cream for 42±2 days.