Welcome to FT! ^
Your inside a 21 day advance fare... so I really don't see it going down (short of a last minute fare). Also, from reports here ex-LHR flights have had very heavy bookings recently. So while 1100.00 seems high, I don't see it going down (but my crystal ball has been known to decieve).
I do have a question for you:
Do you have a better use of 1100.00? (your getting a decent redemption at .02/mi).