See my comments here:
http://boards.fool.co.uk/Message.asp?mid=11530756&sort=whole#11530771
GBP up 0.5p in London....closed at 11.11-11.44 on the touch.....which is 23.04-23.72 in Aussie terms
Which is why stock is being lifted out of the Aussie market and sold into London, given that your offered side was 22.5 at the close yesterday.
ee