Thanks for the reply.
I didn't have YSSY disabled, but I have now done some testing as per this link:
https://support.orbxdirect.com/hc/en-us/articles/360003977396-How-to-disable-or-remove-Asobo-default-airports
I've tried both methods - disabling through Content Manager made no change and then tried the other method in Content.XML and also no change.
I tried these methods one at a time initially, but then because neither made any difference, tried both at the same time, and rather than bringing me in from the left of centre, it was now bringing me in from right of centre.
I did find that by turning on assisted landings, the plane would line up correctly with the runway, but the ILS diamonds would still show the plane was misaligned to the right of the localizer.
As you've shown you have no error, just wondering, I don't have a Navigraph susbscription, are you using Navigraph by any chance ?