By Bansari Mayur Kamdar and Shreyashi Sanyal (Reuters) – European shares slipped in the last trading day of a rough year marked by geopolitical tensions and fears of a recession as central banks hike rates, while London stocks outperformed their counterparts on the continent due to heavy commodity exposure. The STOXX 600 fell 1.3% in thin trading on Friday, as surging COVID-19 cases in China stoked concerns over global economic growth. The pan-European index fell 12.9% for the year, its worst performance since 2018. China-exposed luxury firms such as LVMH and Hermes International declined 2.4%…