 Tim McInnerny , who had starred in The Black Adder and Blackadder II as Lord Percy Percy , was afraid to be typecast in comedic roles and decided not to appear in the third instalment of Blackadder , though he did appear in the episode " Nob and Nobility " , as Lord Topper , a snobby aristocrat who claims to be The Scarlet Pimpernel , and returned in the fourth series playing Captain Kevin Darling . The Prince George character was created as a new " incompetent sidekick " for the title character . He was modelled after George IV of the United Kingdom , who served as Prince Regent between 1811 and 1820 . Laurie had previously guest starred in the final two episodes of Blackadder II , and the producers decided to cast him in the role of Prince George . Laurie 's physical appearance differed significantly from George IV 's appearance , who was obese during the time of his regency . Writers Ben Elton and Richard Curtis were unfazed by this , referring to George as " a fat , flatulent git " , an appropriate description for the real Prince rather than Laurie . 
