When the British soldiers prepare to march for Bunker Hill, one of the soldiers in the front middle of the formation is a woman.
When the British soldiers crest the battlements as the militia retreats, one of them steadies himself on a militia cannon. The cannon moves much farther than it should have based on how much force was applied to it, and returns to its original position afterwards with a smoothness belying that it is not real.
After the British retreat from Boston during the celebration at the Governor's house, the British flag is tossed from the second floor balcony. This version of the British flag contains the red St. Patrick's Cross of Ireland (a red "X") which wasn't adopted until 1801 after the American Revolution was over. In most other scenes which show the British flag, the correct version for the Revolution is displayed.