"Hastings, having long been on good terms with Gloucester, seems to have underestimated the latter’s ambition until it was too late. Ignoring warnings, he attended the fateful council meeting at the Tower, at which Gloucester accused him of conspiring with the Woodvilles against him. The charge was in all likelihood trumped up – probably because Gloucester knew that Hastings would never countenance any move on his part to seize the throne outright."
Quote from the article referenced above.
I've just finished the part of Allison Weir's book re: Elizabeth of York, where the author discusses Richard III's actions - so the comment about Lord Hastings caught my attention.