PERFORMANCE: The large London teaching hospital latest DNA rate was 13.25 per cent, more than 50 per cent over target.

A report said this was “high” and “represents inefficient use of outpatient capacity” against the trust-wide target of eight per cent.

The Improving the outpatient experience report presented to the last board of directors meeting said: “Telephone reminders [are] currently being undertaken by switchboard out of hours” and that areas not using reminderswould be reviewed.”

The report also responded to patient complaints about signage and insufficient information in reminder texts.