document: The data for January from NHS England showed 88.7% of patients were dealt with in four hours. The target is 95%.
  That is the worst monthly performance since the target came in in 2004.
  NHS England blamed rising demand - overall attendances were up by more than 10% compared with the same time last year. There was also a sharp rise in emergency admissions and calls to NHS 111.
  Richard Barker, from NHS England, said: "Against this backdrop it's not surprising hospitals saw a dip in their performance and it is credit to all those working in emergency care that we are still admitting, treating and discharging almost nine in 10 patients within four hours
  "Winter pressures have come late this year with a sustained cold period and an increase in seasonal infections."
  During January the BBC reported how hospitals were being forced into taking extreme measures to cope.
  Some cancelled routine operations en-masse, while there were reports of GPs being advised not to cut back on hospital referrals and emergency treatment areas being set up outside A&E units.
  The monthly performance publication also showed the NHS was struggling in other areas:
summary: A&E delays in England have reached record levels, official figures show.