Single-user licences. 1 or 2 years.
This has been posted before, with some differences, but was then expired - it still works, just tried it!
1. Go to http://www.kaspersky.com/ukrenew
for a 30% discount on the licence
2. use the WHSMITH discount code for another 50% discount
Also - if you go through QUIDCO first, then change the URL manually to kaspersky.com/ukrenew, there is a fair chance that quidco tracks at 15%!
Note: this method buys you the 1-year or 2-year licence key - the actual SOFTWARE can be downloaded for free (incl a 60-day trial licence) at http://www.kaspersky-labs.co.uk/trials/reg/kis7/