One of the better UK sci fi films of the era, probably better financed than most. Howard Keel wandering around a deserted, traumatised Westminster is unforgettable. Poor monsters prevail, but a suspenseful and atmospheric film with characters you can care about. Luscious colour.
I give this two stars only because it is in the tradition of British Sci-Fi / Horror movies of the 50's and early sixties. However, it bears little resemblance to the John Wyndham novel (as far as I remember it) other than featuring a meteor shower and Triffids. In this film the Triffids play the role of the gruesome monster and their appearance is accompanied by lots of female screaming and male horrified but stoic faces.
Added to this is the fact that the DVD seems to have been copied straight from a VHS release. To make up for the fact that the resolution is so poor they put a black "border" at the top and bottom of the screen so that the fim actually occupies less than 50% of the available TV display. This makes the much smaller display look sort of OK, at least with an upscaling DVD player. However if, like me, you increase the size of the display to almost occupy the full TV screen then you will see just how truly awful the resolution is. So it is a choice between postage stamp display of blocky graphics!
All that said, if you like the genre, then it is not a dreadful film and I at least watched it to the end.