Thanks for those pictures ST, I wasn't aware that Raft Spiders existed prior to your posting, very interesting.
They have a dedicated web site which gives a very thorough overview of the species, definitely worth a look -
link
The site administrator's asking anyone who's found a population of
Dolomedes plantarius to contact them with photos, site location etc., they'd be pleased to hear from you.
There are some good macro shots of the spider on the FM forum -
This photographic community make you feel like binning your camera when you see the work they knock out, the macro section of the forum's particularlly intimidating...... the level of sophistication of some of their gear is phenomenal. This kit, designed for photographing subjects in flight made me realise that I'm operating in the photographic equivalent of the Stone Age!