According to the England & Wales, Death Index (vol 20 pg 1565), there was a Ronald Hubert Bloomer (b. 22 Feb 1926) who died Aug 1989 age 63 -- in South East Hampshire, England.
There was also a Hubert Bloomer who married Joan M Tull betw.Jul-Sep 1949 in Gosport, Hampshire (England & Wales, Marriage Index: 1916-2005, Vol. 6b, Page Number: 643).
So, if this is your Hubert and, as Annie found, he did apply for permission to remain in Aust in 1946, then looks like it didn't pan out & he ended up staying in England...
Update:
I think this also might be a record of when Hubert returned to England:
Information removed due to copyright violation. See http://www.rootschat.com/forum/copyright.php for more details
RootsChat must deal with any breach of copyright by its members.
For some time the team of Copyright Editors has been removing breaches of copyright and sending detailed personal messages to the member that had posted the information. Due to the volume of posts and members this is now impractical. Messages in breach will simply be deleted and this notice posted. We apologise for any inconvenience caused but are sure you will appreciate the importance of this issue.