[1] Shackleton arranged the 1932 Oxford University Exploration Club expedition to Sarawak in Borneo organised by Tom Harrisson.

In 1934 Shackleton organised the Oxford University Ellesmere Land Expedition and chose Gordon Noel Humphreys to lead it.

On leaving the university, he worked as a Talks Producer for the BBC in Northern Ireland – an experience that turned him away from the Conservatives towards Labour.

On 29 July 1940, he was commissioned into the Administrative and Special Duties Branch, Royal Air Force Volunteer Reserve, as a pilot officer on probation.

[8] Shackleton relinquished his commission on 15 July 1956 and was granted permission to retain the rank of wing commander.

The following year, he was promoted to be PPS to Lord President of the Council and Foreign Secretary Herbert Morrison, one of the heavyweight political figures in the post-war government.

[10] Shackleton delivered his maiden speech in the House of Lords on 11 November 1958, in a debate on a Wages Councils bill, one he thoroughly approved of and welcomed, to increase understanding between unions and management.

In April 1968, after the budget, Wilson made Shackleton Leader of the House of Lords, succeeding the Earl of Longford.

Sitting on the committee for Civil Service Reform, Shackleton successfully widened access to entry for scientists.

[11] Lord Shackleton's Garter banner, which hung in St. George's Chapel in Windsor during his lifetime, is now on display in Christ Church Cathedral, Falkland Islands.