Tim Roth plays the notorious serial killer John "Reg" Christie with bone-chilling eeriness, a masterly performance to no small extent aided by the cinematography and lighting, which would have had Hitchcock nodding in approval, and which borders as closely on the exagerrated as it gets without overstepping the line (in my opinion). The set design provides the appropriately grim backdrop of the poorer areas of 1940s and 1950s London, and the soundtrack is certainly enough to make anybody lie awake wondering what might be lurking under the floorboards of the house you just moved into.
The story is very well told, leaving enough for the viewer's imagination to add to the horror as the ghastly details creep into your mind. But there is a piece missing at the very end, as if the director suddenly realised that the allotted running time was quickly running out, and had to cut out a large chunk without forethought.
That, unfortunately, takes away a few stars from what would otherwise have been a little masterpiece, but which is now left marred by an ending that seems oddly thrown together with too many loose ends dangling.
Nevertheless, it's well worth a watch - you'll never look at your balding uncle the same way again.
