Ingrid Loyau-Kennett who was declared a national hero for confronting the crazed Muslim killers of Lee Rigby has been detained under the Mental Health Act following an incident involving the racial abuse of a Tesco employee in Helston, Cornwall.

Loyau-Kennett was praised by David Cameron for facing killers Michael Adebolajo and Michael Adebowale in the immediate aftermath of the bloody brutal killing in Woolwich last year.

She was detained by mental health services in Cornwall following a report that a worker in a branch of Tesco was racially abused in a store.

A spokesperson for Tesco said: "We are aware of an incident which took place at our Helston store on Friday. Colleagues at the store are helping the police with their inquiries."

On the first anniversary of Rigby's death in May, Loyau-Kennett said she remains haunted by dreadful memories from that day. She spoke of still seeing their blood soaked hands and Army drummer's Rigby's body lying in the road.

Returning to the scene, she said: "This street looks like a normal street now but I can still see the body, see the crashed car and see the bloodied hands."

A Devon and Cornwall Police spokesperson said: "On Monday June 30 following a report for a concern for welfare, a 49-year-old woman from Helston was detained under the Mental Health Act."