No idea what kind of rates you've gotten so far... but going thru
www.mobissimo.com
Brought me to
www.opodo.com (the rate on mobissimo lied)
http://www.opodo.co.uk/otpbvpl/Jsp/o...&NUM_OF_INFS=0
that fare was 972 GPB (if I could do the conversion in my head I would)
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You might also want to check alternate airports...