The body of 64 year old Major Janet Gilson was found hidden under a sofa at her niece's home in Lamma, the third largest island in Hong Kong, in March 2011. She had been reported missing three days earlier.
Ahmed Fareed, who was 29 at the time of the killing, was found guilty of murder and sentenced to life imprisonment yesterday.
The court heard that she had been suffocated after being strangled with a rope and had a towel stuffed into her mouth. Four of her ribs had been broken.
It is understood Fareed was the ex-husband of Maj Gilson's niece and had been barred by a court order from entering the property.
Maj Gilson had retired shortly before her death and lived in Leigh-on-Sea, Essex.