I just realised that at the top of the Williams site there is 'car under cover' graphic. Quite a transparent cover and all, it reveals underneath to be a chassis i don't recognise. Could this be a preview of the FW34?
http://www.williamsf1.com/
The air intake seems to be more triangular in this image, unlike the FW33, but not like the more triangular FW32 either, it seems more like the Mercedes original roll hoop from 2010.
The nose also appears different, without the hammerhead style cameras of the FW33.
It looks as if the dash bulkhead, is quite low also, so this could maybe be a 2012 nose?
Rear wing endplates are also different to FW33
Any ideas? Is this an FW34 preview, or am I just being silly?