I've been checking fares for London to Dulles, and have found that restricted tickets have doubled in price, but flexible tickets have not. i.e. 28 day Apex is now 500 GBP rather than 250GBP, econ 900 GBP. These arn't even for travel very close to the millenium, but mid Dec to 5th Jan. However, I've not been looking at different routings, days, etc yet, so it might just be bad luck on my part.