Sir Alexander, who was widely known as Sandy, died at his home on Saturday.
During his time in Guernsey, Sir Alexander introduced the Lieutenant-Governor’s Cadet Scheme, which is still running today.
Sir Sandy was born on 3 August 1928. He had a long and distinguished career in the British Army. Immediately before his appointment as Lieutenant-Governor, he was General Officer Commanding in Scotland, and before that he commanded 2nd Armoured Division.
He was mentioned in despatches for his services in Borneo during the Indonesia-Malaysia confrontation of the mid-1960s. In 1974, he was appointed a Commander of the Order of the British Empire for his work in Northern Ireland during the Troubles.
Sir Sandy’s wife, Lady Boswell, predeceased him aged 85 in January 2018.