The number of patients left needing further treatment because of botched NHS operations has soared more than 70 per cent in five years. Patients needed extra care as a result of 23,997 such incidents last year, up 72.6 per cent from 13,903 in 2018/19, according to NHS England. The trauma can leave people in pain, delay recovery and place them at additional risk if procedures need to be repeated under general anaesthetic.