Leicester Royal Infirmary trust has 'apologised unreservedly' after letters were sent to 20 dead patients, asking them what they thought of the hospital's service. A 73-year-old man, who had already had an ambulance turn up to take his wife to an outpatient appointment three months after her death, received one of the letters. A full investigation is now being carried out by the trust, which believes the errors were caused by problems with two computer databases.