Looking at the article in The Times, 15 June 1956. It's there! The exact address.
Eileen Mann, aged 33, a cleaner, of 189, Hampstead Road, N.W., was charged at Clerkenwell Court yesterday with the murder of Herbert White, 47, at 189, Hampstead Road on June 13. The Magistrate (Mr. Edward Robey) remanded the accused woman in custody for a week and granted her legal aid.
Herbert B White on the electorals must be the man.