The crew investigated Logue's former consultation rooms, but they were too small to film in. Instead, they found a high, vaulted room not far away in 33 Portland Place. Eve Stewart, the production designer, liked the mottled, peeling wallpaper there so much that she recreated the effect throughout the entire room.  In his DVD commentary, Hooper said he liked Portland Place as a set because it felt "lived-in", unlike other period houses in London. The scenes of the Duke of York at home with his family were also filmed here; showing the Prince living in a townhouse "subverted" expectations of a royal drama. 
According to most accounts, the popularity of Powell's perspective on race may have played a decisive contributory factor in the Conservatives' surprise victory in the 1970 general election , although Powell became one of the most persistent rebels opposing the subsequent Heath government.   In "exhaustive research" on the election, the American pollster Douglas Schoen and University of Oxford academic R. W. Johnson believed it "beyond dispute" that Powell had attracted million votes to the Conservatives, but nationally the Conservative vote had increased by only million since 1966.  In his own constituency at that election – his last in Wolverhampton – his majority of 26,220 and a per cent share of the vote were then the highest of his career.
The length of the speech should be somewhere in the region of 1300 to 1400 words, and you need to read it at slow steady pace. If you’re reading that number of words in anything under 6 minutes you’re absolutely belting through it. Th trick is to achieve a ‘stand up to sit down time’ of 10 minutes, and that means a talking time of around 8 minutes. If you practice at home, people always speak more quickly when they’re rehearsing it, and your talking time is around 10 minutes, then with laughter applause and heckles that will easily become a 15 minutes speech on the day, and that’s far too long.