If I am overseas and I claim for cancellation expenses for a trip which is within my travel dates, does my policy end?

If you are already travelling:

If your trip is unexpectedly disrupted and it is for reasons that you can claim for, you can submit a claim for trip disruption expenses and your policy will not end. 

If you have not yet left for your trip:

If you have to unexpectedly cancel your trip for a reason that you can claim for, and you submit a cancellation claim, your policy will end. Another travel insurance policy will need to be purchased for a new trip.

Cover is subject to the policy terms, conditions, limits and exclusions in the Product Disclosure Statement (PDS).