Singer George Michael was taken to hospital in an ambulance after collapsing at his Highgate home.

A worried friend was reported to have called 999 when the 50-year-old fell ill last week.

Two ambulances were sent to pick him up and take him to an unnamed London hospital last Thursday before 8am.

His agent told The Sun newspaper in a statement: “George Michael was in hospital for routine tests but there is nothing further to say.”

A London Ambulance Service spokesman said: “We were called just before 8am on May 22. We sent two ambulance crews and staff treated one patient, a man, who was taken to hospital.”

Mr Michael battled pneumonia in late 2011 and in May last year, he was airlifted to hospital with a head injury after falling from his car onto the road.