Strip him of his position as Leader of Lib Dems and sack him as an MP.
Why is this important?
After the years of hiding the dreadful errors and abuse of the Law by the Post Office over the Horizon computer debacle. Ed Davey was the Minister in charge of the Post Office whilst all of this went on but has failed totally to accept any responsibility. If revealed at the time it would have been a resigning matter so now he must accept this and if not stepping down face up to being sacked.