Canberra question

Can anyone help with the following Canberras:
XH136 – Can anyone give this aircrafts history before taking up 8782M.

WH798 – Supposedly in Canterbury, can anyone confirm this?

WH903 – The origional nose section is at Elvington. What happened to the second nose? Last i have was it was tenderd in June 1988. It was thought to be at Charlwood but this is WK146.