What a relevant topic!! I ordered a pair of the aero blades from
www.wiperblades.co.uk (as mentioned above) at around midday on Wednesday and they were sat waiting for me when I got home yesterday! I went for the Bosch ones and including postage cost £26.50 or something.
To fit just unclip the old ones, lift the cover on the new wiper and slide the arm through, then just clip it in. There's a small diagram on the box, and it's dead easy.
The passenger one doesn't seem to sit agains the window when 'at rest' but as soon as they wipe, it must touch as full coverage is achieved. They are silent even when the screen is dry, so i am well pleased.