For the Love of Honey

Is the death of a policeman's wife in any way related to the death of a retired gynaecologist just a couple of weeks earlier? Or, was the gynaecologist's death an accident and someone later used the same MO to confuse the situation? DI Simon Grant would have had his work cut out for him even if it wasn't for the uncomfortable fact that it is all happening practically on his doorstep, that one of the victims is a member of his extended family and the other one the wife of a colleague. Involvement of the Secret Service threatens to render the case unsolvable.