A critical incident has been declared by University Hospitals Birmingham because of what it says are extreme pressures on services. The first week of January has seen an "exceptional number" of patients with flu requiring hospital admission, which has now affected 311 inpatients, the NHS trust said.

Here’s a list of which hospitals we know have declared a critical incident so far: Basingstoke and North Hampshire Hospital, Hampshire Hospitals NHS Foundation Trust Royal Liverpool Hospital, Liverpool University Hospitals NHS Foundation Trust Good Hope Hospital, University Hospitals Birmingham NHS Foundation Trust

The number of flu patients in hospital in England is nearly five times the figure at the start of last month. NHS England has published its latest monthly performance data for hospitals, along with this week’s snapshot of winter virus levels and A&E pressures. Here are the key figures from both reports: