A timeline where the Yorkists ultimately won the War of the Roses.
Point of Divergence
Henry Tudor was not warned about Pierre Landais’ betrayal of him. Henry and many of the Lancastrian supporters were captured in Vannes. While much of the Lancastrian leadership was executed Henry Tudor was imprisoned to keep the leader of the Lancastrians underfoot rather then having just another pretender take up the cause.
While English is about the same as in our timeline, we would find it archaic sounding the use of the singular second person pronoun and other grammatical word forms are still in modern use.
Because there was no conflict between King Henry VIII and Pope Clement VII the Church of England did not develop as it did in the our timeline, however England did still become predominantly protestant.