According to the raters and reviewers on RateRuns, this marathon is the world's best rated marathon taking place in the month of February http://rateruns.com/?p=690 - maybe an idea for someone already now looking into marathon(s) for next year
Thanks everyone and agree that the co.uk version of RunnersWorld is great for UK races reviews/ratings (just like the .com version is great for the runs in the US). What I find missing, however, was for example input and ideas for Copenhagen v.s. Stockholm marathon...etc.
@Sussex Runner, will definitely consider Milton Keynes but in order to give this race some more attention, please leave your rating here http://rateruns.com/?p=593 to help people in their decision making between Barcelona, Dubai or Milton Keynes