Simon Lowe ( born 30 October 1973 ) is a British actor who , amongst other titles , has played series regulars in '' Bodies '' ( Dr. Tim Sibley ) , and '' The Grimleys '' ( Shane Titley ) , both of which were written by Jed Mercurio . He also played Derek Evans in '' EastEnders '' . He is also the regular character , Sgt. James Collins in the British series , '' Doctors '' . As a teenager in the late 1980s , he had a regular role in the Central Independent Television soap opera '' Crossroads '' , playing Jason Grice . In 2007 , he portrayed the survivor of the Hindenburg disaster , Joseph Spah , in the drama from Channel 4 , '' Hindenburg : The Untold Story '' , directed by Sean Grundy . In 2010 , in Channel 4 's '' Bloody Foreigners '' , he playing the role of Jan Zumbach , of 303 squadron . In 2011 , he made a single appearance in HBO 's '' Game of Thrones '' as a wine merchant , and he has portrayed Mr Bell in the '' 4 O'Clock Club '' since 2013 . He also plays Sir Cumference in the " A Knight 's Tail " section of '' Hacker Time '' . Theatre work includes the portrayal of Dudley Moore in the show , " Pete and Dud : Come Again " that successfully toured United Kingdom in 2007 , alongside actor Gareth Tunley playing Peter Cook . In 2013 , Lowe appeared as the monk in Bryan Singer 's '' Jack the Giant Slayer '' , as Dr. Quentin in the adaptation of '' The Big Four '' , for the final series of '' Agatha Christie 's Poirot '' , and as an snobbish maître d' in an episode of '' Downton Abbey ''
Hindenburg disaster
Hindenburg disaster
Simon Lowe