LONDON, Aug 5 (Reuters) - The Bank of England kept the size of its bond-buying programme unchanged and held its benchmark interest rate at a historic low of 0.1% on Thursday. Economists taking part in a Reuters poll had expected no policy changes by the BoE, despite a post-lockdown rise in inflation. (Reporting by David Milliken and William Schomberg, editing by Mark John) Our Standards: The Thomson Reuters Trust Principles.