You won't get an answer from Amex. All they will do is put you through to ACE and then the answer depends on which agent you get. If you get the agent who believes you only have to pay for the airfares in and out of Australia on the card then he will be fine because the eurostar trip is irrelevant. However if you get the agent who believes all travel must be on the card or the agent who believes all international travel must be on the card then he may have problems.
Probably the only way to get clarity is to write, set out the circumstances of your travel and ask for confirmation in writing whether you are or are not covered.
I was thinking about this again over the weekend too...
It seems that in order to get the general insurance cover (ie medical expenses, lost luggage, replacing your passport) you need to pay for the 'trip' (out of and back to Aus) on your card, in full. Then while you're away you need to pay for any 'common carrier' trips in order to be covered by the Transport Accident Cover while on that mode of transport (eg train within Italy). Then if you travel to another country this seems to be considered
another 'International Trip' which then needs to be paid for on your card, in full for you to get all of the general travel insurance cover while you are in the other country...
An example...
MEL - LHR - MEL.... Paid for on Card = covered for medical, lost passport etc while in the UK
Flight London - Manchester - London... covered for the above because it is in the UK. However should you wish to 'activate' the TAC you need to pay for this flight on your card also.
Then you get a flight from London to Rome... In order for you to be covered for the basics of your travel insurance (eg medical, lost passport etc) you need to pay for this flight on your card also as this is a
different international trip to the one from MEL to LHR...
So my understanding so far is that if I pay for all my flights leaving Australia and while I'm away (assuming I don't travel between countries by any means other than aircraft) then I should have continuous
travel insurance
cover while I'm away.
Any modes of transport will also have the TAC activated should I choose to pay on my card, otherwise if I'm injured (and I would only get a benefit if so severely injured that I lose an eye/arm/leg/die) in those vehicles then I don't get TAC benefits.
Given I'm a fit and healthy 25 year old the PEMC issues don't concern me at this stage (but doesn't sound like it would be hard for them to apply), and I don't often travel for 'adventure sports' (and am ok with buying specialised insurance should I choose to go skiing overseas) and usually book all my travel on my card before I go... then I should be find as long as I don't worry about whether or not the TAC is activated for all parts of the trip that I'm taking.
Fair summation based on what we all understand to date??