Although it says 'Half price £1.49' on this page, if you click where it says that, it says 'now 74p'. I checked my local store last night and they were the same price in store so I would presume this would be national.
At one time they disappearred off the shelves - presumably due to low demand, but a lot of people do require 'lites' - particularly at the beginning or end of periods. If you don't normally buy them, it might be worth a shot for 74p!
All Tampax Pearl is half price at Tesco until 5th July so stock up!