The Canberra Liberals have dumped conservative party member Jeremy Hanson as deputy leader, in favour of opposition health spokeswoman Leanne Castley. Key points: Jeremy Hanson has been ousted as the Canberra Liberals' deputy leader Leanne Castley will take his position in a shake-up Opposition Leader Elizabeth Lee describes as "fresh" Chief Minister Andrew Barr says the spill shows "instability" within …