Thanks, bookmarked the page "The Customer" linked to. Don't need it right now, and hope to never need it, but I like to be prepared.
I think the amount of the refund is defined by statutes. I think that if your flight costs over £400, you get £400. I could be wrong. But I don't think Eurosystem0 is doing anything unethical here by getting a refund greater than his ticket price.