Sadly, one of those sitcom films that simply does not work when you take the main characters out of their usual environment - even the Fourmiles only feature briefly at the start and end of the film.
Considering the superb TV series, this verges on the dire, there's a couple of reasonable jokes............
When she introduces herself to the Spanish lothario, and then bores him to death with the state of her marriage.
Mildred : "Mildred Roper, nee Trembler"
Mildred : "And the honeymoon? Two solid weeks of Monopoly! The only thrill of the fortnight was when he landed on my waterworks"