Wow, that is very interesting, Colin - I had no idea that 13199/17 went to Ausralia. And, thanks for finally identifying the Park where all those German a/c were exhibited!! Do you have any dates for when the display at St. James Park was ?? Obviously post-war.
Here is the stripped Hannover at islington. Note that not only the fuselage, but the port top wing has been uncovered as well, along with the bottom wing..
Here is 13199/17, displayed at St. James Park. The entire upper wing still seems to have its fabric covering.
I would agree that they are most likely not the same aircraft, probably.