Surprised it's taken so long, but I got an email from HMV today saying they have opened their online store.
http://store.hmv.com/film-tv
They have 100 blu ray titles in a 5 for £30 including the two film Kill Bill boxset as one of the five for £30.
Worth a look.
http://store.hmv.com/film-tv/blu-ray-5-for-30
BTW, the website is quite slow atm. 
This item was edited on Thursday, 11th June 2015, 17:34