You kidding??
That was BEFORE you joined the CEE (common market by the time), therefore you can not call on previous commitments. They are talking about present and future expenses already compromised so...
On the other hand, there is no better place to fight a war than outside your own country, the WWI and WWII both, were fought not because of Europe, the CEE, EU, NATO or whatever, but because of politics and the chance to stop Germany to eventually get to invade UK after "solving small issues in the continent".
This is history-fiction, but can you imagine what would the picture look like if the Battle for Britain had been fought some years later in your coasts instead of Normandy?
WWI: UK enters the conflict on the 4th August (1914)after Germany declares war to Belgium due to its denial to let tools pass on the way to France.
WWII: UK enters the conflict on the 3rd September (1939) after the ultimatum to Germany to get our of Poland.
It is good to be proud of your country and your dead soldiers for what they did, it is not to try to enforce with fake/invented/un connected history your way of thinking (as just seen in Spain).