Through an unfortunate decision by a junior officer, the quiet life of Major Poskett (Alfred Marks) in the desert, is thwarted by the perceived need for "entertainment". This arrives in the form of Bert Bennett (Sid James) and Gay Bennett (Dora Bryan) along with their band of "artistes". After their "debut" performance, they are commissioned to entertain troops across the battlezone and, of course, they end up in trouble! Thus ends Major Poskett's "quiet life" in the war.
With Miss Patch (Irene Handl) playing a most sorrowful tune in a brothel (something that is actually extremely clever), which has everyone in tears; Sid and Dora singing cockney songs - badly - and the other entertainers with a variety of different "acts", they manage to entertain the troops. In the midst of this, Bert discovers the troops enjoy singing "Lilli Marlene" and he endeavours to find the composer. However, in the meantime, his own attempts at writing the lyrics are hardly to be called successful, but they are a witty addition to the story.
On their travels, they somehow (more through luck than anything elese) manage to find and thwart a Nazi team masquerading as British soldiers.
Completely farcical, highly entertaining and fun. It certainly isn't a "classic", but just for sheer entertainment, it is certainly worth a watch.