As a non professional pilot, some observations. I would assume the commander having considered performance data, vref, LDA, experience, wet runway, decided to divert to Doncaster, and this was all done BEFORE he made an approach. Why would he attempt an approach, in the hope the runway might dry, knowing he had already decided against landing. Well done capt, made an operational decision stuck to it, everbody home in bed that evening. Normally I leave this forum to the first Ps in Prune but forgive me on this occassion for contributing, but pure annoyance forced me to add my two bits worth to this tosh. These same people would be the first to have an opinion if an excursion was the outcome.