I've got the service record of a 222 Sqn pilot (Spitfires then Tempests) who spent some time between 'tours' flying for '84 Group Communications Squadron' (Treble Two being part of 84 Gp) - ORBs for 84 Gp CS record multiple flights in Austers that he completed in late 1943-early 1944 in northern France and the Netherlands. They were used for general 'odd' jobs for the operational squadrons, it seems - eg ferrying pilots to pick up other aircraft or doing the mail run etc. So the Austers got around a little bit (though at no great speed I'd reckon...).
Adam