Dec 2 (Reuters) - European shares slipped on Wednesday as investors took stock following a near 14% rally last month, while shares in BioNTech surged after UK became the first country to approve its COVID-19 vaccine developed with Pfizer. London’s blue-chip index outperformed regional peers, losing just 0.1% after Britain said the vaccine will be rolled out from next week. BioNtech’s Frankfurt-listed shares jumped 8.4%, while Germany’s benchmark DAX index fell 0.5% despite data showing a higher-than-expected rebound in retail sales in Europe’s largest economy in October. The pan-European STOXX 600 index was down 0.4% with oil stocks leading declines, as crude prices were hit by a surprise build up in oil inventories in the U.S. and as OPEC and its allies left markets in limbo about production in January. (Reporting by Susan Mathew in Bengaluru; Editing by Shounak Dasgupta)