I've just received their daily email and they're currently offering 50% off all Butterick patterns until midnight on 5th March.
I just had a look and the prices are all in the range from £5.75 to £6.25, although the only ones of any interest to me are the two slightly different men's pyjama sets (which are a bit... meh), but there's the usual larger variety for women, kids, plus a few accessories & upholstery patterns.
It seems these are all paper patterns too, no PDFs at all.