[3] Underdown's early theatre credits include: Noël Coward's Words and Music and Tonight at 8.30; Cole Porter's Nymph Errant; Moss Hart & Irving Berlin's Stop Press; and Streamline.

[4][5][6] His film credits include: They Were Not Divided, Beat the Devil, Wings of the Morning, The Rainbow Jacket, The Woman's Angle, Her Panelled Door, The Camp on Blood Island, Dr. Terror's House of Horrors, Thunderball, Khartoum, The Magic Christian and Digby, the Biggest Dog in the World.

[8] Edward Underdown was also a gentleman jockey and rode with great aplomb in both flat and hurdle races (see references to his riding career in John Hislop's books).

Charles Underdown and Rosemary Grimston were sixth cousins through their common ancestors Thomas Villiers, 1st Earl of Clarendon and Lady Charlotte Capell.

As soon as John Le Mesurier arrived he realised it was familiar to him from weekend parties Edward's father had invited him to in the 1930s.

He reputedly appeared at the depot with his friend, Sandy Carlos Clarke, who had recently returned from Canada working as a ranch hand.

[24] Underdown went on to have a distinguished Second World War record as an officer in the Wiltshire Yeomanry serving in the 8th Army in Africa.