Two NHS hospital chief executives have resigned following mistakes that led to long wait times and ultimately compromised patients' safety. The two chiefs in question, one who headed Bart's Hospital in London and the other who led West Middlesex University Hospital in Isleworth, west London, allegedly did not meet waiting time targets and failed to record lapses correctly. Also, the strategic health authority was not informed of any difficulties, which is required under procedures to help hospitals share the strain in times of exceptional demand.