This review refers to the Icon Home Entertainment release of 2011.
My copy has arrived, and I hope it's not an indicator of the rest of Icon's classic Hammer output. The good news is that the X certificate screen is presented at the start. The bad news, and it is very bad news is that it's a dirty, scratched print and is covered in random colour noise. It's normally a clue that an older, composite analogue master has been used. Worst of all is ghosting reminiscent of either a NTSC to PAL conversion, or a dodgy interlaced one. Iffy sound tops it all off. It's noisy, full of clicks and pops and sometimes has a high pitched whine to it that'll set your dog off howling. Some dialogue in the second half of the film becomes inaudible through the sheer level of loud pops.
The disclaimer at the start about the quality and age of the material is surely a joke. The age or otherwise of a film is not an excuse to release a substandard DVD when better source materials do exist. It's criminal that such outstanding films from the history of British cinema are presented this way in 2011.