No one forces me, or any other writer, to sell a film option on the books. If you don't want to run the risk that the filmmakers may adapt your work in a way you don't like, then you don't sell the option. You know when you sell it that they will have to make some changes, just because film and TV a
Every person who is offered a knighthood has the opportunity to say yes or no. You get a letter from the Prime Minister saying you've been recommended for a knighthood and there are two little boxes, one says yes, one says no.
Although this is a fictitious story the history is real. You don't want to re-write history but you certainly want to portray events and characters as realistically as you can.