Scotland) are to blame. This particular mistake prevented Richard from being able to stop Tudor from crossing the channel, and so it was left up to nobles Richard believed to be loyal to resist the invasion, this belief also backfired when Rhys ap Thomas joined Henry when he was promised the Lieutenancy of Wales.
The Loss of the Throne by Richard III There are many views as to whether Richard III lost his throne, or if it was a mainly Tudor advance which secured it. Overall I think that Henry Tudor did not actively gain the throne decisively, in fact Richard III lost it from making key mistakes throughout his reign, and at Bosworth. Richard weakened his grasp on the throne by indulging in a vast plantations policy which gave too much power to Northerners and inevitably made him dependant on these