Wonder if there's any unusual circle fares you could do for something like the 170 TPs - eg LHR-DUB(BA)-MAD(IB)-IST(IB)-LHR(BA).
Guess it could be somewhat crazy pricing...
Second cheapest is just over £1400 - LCY-IOM-DUB-MAD-ORY-LHR and only gets 160!