I noticed the weighted average user rating on IMDb.com for this film was only 5.6 and mainly voted for by males/females aged 45+.I thought it a cracking murder mystery and watching it tonight on YouTube.com and I voted 7/10.I had just started infants school when this was filmed in 1951 (I am now 65) but was attracted to it by seeing Edward Underdown in the cast list and seeing it was a wholly British film.The afore mentioned actor (1908-1989) played "Harry Chelm" in the cult John Huston 1953 film "Beat The Devil" playing the husband of my personal sex goddess film favourite, the late Jennifer Jones.
Like another reviewer I enjoyed seeing England as I remember it in my childhood.We too holidayed in Kent in the late 1940s/early 1950s.I particularly enjoyed seeing the almost complete absence of private cars and how one could park almost anywhere without seeing those wretched double yellow lines/no parking/"resident parking only" signs we see today.Maxwell Reed seems to be a favourite of the few reviewers above and I too have the DVD of him in "The Clouded Yellow" (1951) starring another of my raven haired favourite film actresses, the late Jean Simmons.
I was intrigued by the user comment that Edward Underdown (1908-1989) was much older than Natasha Parry who plays "the love interest" and indeed she is apparently still with us being born in 1930 and so was only 21 when this was filmed, while Edward was 43 during filming a sizable age difference.You rarely see detectives kissing the heroine on films of this age but Edward made a wry comment that "little detectives have to be born sometimes"!