Artist's impression of Handley Page HP.111 or "Trebble One" derived from the Handley Page Victor.
Source: http://www.thunder-and-lightnings.co.uk/victor/history.php
Source: http://www.thunder-and-lightnings.co.uk/victor/history.php
A brochure on the HP.111 shows it being used for paratroop dropping both rear doors being used.