I think you just have to void the league season.

While its unfair on Liverpool who are so close to the title, if you start giving them the title then what happens to the relegation spaces and European ones? Especially as both villa & Sheffield united have games in hand so those could, if played, be the difference between relegation & European football.

Start next season in august with everyone in the same position as they were for the start of this one (except possibly city who have a European ban)