Vista - The price is right £50?

[#1]

NHS versions of office include office xp; 2003 and 2007 they also include office for the mac version 2004.
The cost you pay is for P&P when I bought a few months ago it was £17 approx for the enterprise version of office 2007.
Access 2007
Communicator 2007
Excel 2007
Groove 2007
InfoPath 2007
  OneNote 2007
Outlook 2007
PowerPoint 2007
Publisher 2007
Word 2007
To get the code you need to setup an nhs.net email account from a pc within the nhs national network. Your details are checked against your login name when you 1st register. Once you have this address you go to the nhs home user page fill in your nhs.net email address. MS send you a code which you can then use to order you software.

MS Home user page.
http://www.microsoft.com/uk/nhs/pages/nhs_licensing_home_user_programme.aspx
Other software such a Vista is avaliable for reduced costs from MS but it is often chaper to but these items from ebuyer or das etc.

[#2]

But if you arent in the NHS your best option for Vista is still probably the academic version.