We regularly book TATL, LHR-IAD in WT+ and then MFU to CW [being sensible people

] One trip in Spring, and one in Fall.
We're waiting to book to IAD in Sep 12. Recent years, taking advantage of sales, indicate we've booked ...
2 Feb 08 [eeek, that was CW, but that's because we were late getting organised].
16 Jan 09 - for Sep/Oct 09
6 Apr 10 - for Sep/Oct 10
28 Dec 10 - for Sep/Oct 11
It seems to be August for a May booking, and '
imminent' for a Sep booking. However, the "Advent Bonanza" may delay proceedings a bit.
All you can do is keep checking