If you are booking to the UK, you will get a better rate with Expedia.com from LGW - ANU - EIS - unless of course you need to book with miles etc. Looking at Expedia, there are return flights for $900 in September - with the ANU-EIS leg with Intercaribbean! Also look at Intercaribbean as an option, they are direct from ANU and are pretty reliable (but not daily).
