SIR – I can think of nothing in my 67 years that makes me more ashamed to be British than the scandalous behaviour of the Post Office in the Horizon fiasco (Letters, January 8). What makes me most ashamed is that it has taken a television dramatisation, ITV’s Mr Bates vs The Post Office, to spur our self-satisfied and self-protecting establishment into taking action. Nigel Cowan Cheltenham, Gloucestershire