This is a World War II propaganda film akin to The Young Mr. Pitt (1942) with Disraeli meant to represent Winston Churchill. The scene in which Disraeli observes Victoria receiving the news that she is now Queen was based on an 1880 painting by Henry Tamworth Wells.
In a radio interview with John Miller broadcast in December 1978, Sir John Gielgud recalled that the fish skin used to make up the elderly Disraeli gave him impetigo. Filming took place during the early stages of the Blitz and the extras would get angry if he got a take wrong, as they wanted to return home before the blackout.
Disraeli's supposed first glimpse of the Queen is based on a famous Victorian painting titled "Victoria Greeted as Queen".