Generally I would be saying the same as Gumshoe - no point in doing a load check that far out but that's the last weekend of 1/2 term in a large part of the country so lots of people coming back from the US to the UK.
A lot of people may be using the ATL-MAN route to get back to the UK from a plethora of US destinations using DL connecting flights.
Huzzah for International Jet-setting !