I agree with Jonathan over at Catch a Fire that when a member of parliament is elected under one banner and decides to join a different party or go independent they should resign and re-contest their seat.
Terry Lister, who recently announced he would leave the PLP to stand as an independent should resign his seat and re-contest it. Now would be a great time to do it as he could capitalize on the malaise felt by the public towards the PLP and the disappointment felt towards the OBA. It would enable the voters in his constituency to clearly send a message to both parties without disrupting the present course of things. If he instead waits for the next election and stands as an independent it is likely this will be his last term as an MP.