I think both the '50s and '60s were a golden age for Sci-Fi films and after Roswell, it seemed everyone was having a try at 'alien invasion' films.
Okay, this film isn't going to set the World alight with its plot, acting, music, or anything else but it's still a delightful watch for fans of the genre, either as a nostalgic look back at Sixties Britain, or for those interested in the history of such films.
Incidentally, being a big fan of TV and film from that time, probably as I grew up with it, I kept recognising classic sound effects, many of which probably also 'served' in other movies and ITC TV series of the time.