Please do not let the early part of the film, where this argument is taking place, make you discount the rest of the film. It is historically accurate; Wilberforce was against the British fighting the American colonists.
This was well-acted, and I give it higher marks than does Mr. Steyn. The recreation of the London docks was realistic and a bit awe-inspiring. The costumes were meticulously done, and even captured the change in women's clothing and men's hairstyles between the late 18th and early 19th centuries. I have seen very few films manage this with accuracy.
I found the film inspiring. We are going to England next year, and we will say a prayer for Wilberforce and Pitt, who are buried next to each other in Westminster Abbey.
Thanks, I love well done period pieces.