Being one of the infrequent Norman Wisdom vehicles covered in "Leonard Maltin's Movie & Video Guide" - which he rates a lowly *1/2 - I was wary of this title but, actually, it was quite pleasant if, in no way, a classic!
The very first scene is an inspired one: we see Norman's sweaty face in an atmosphere of overbearing heat (the film was shot by Jack Asher, a talented cameraman best known for his work for Hammer but who also happens to be the brother of the director!) meticulously going about his business thinking he works in a steamship or something, but eventually discovering that what he's doing is simply pressing a pair of pants (a sophisticated style of gag which has been utilized as early as Harold Lloyd's SAFETY LAST [1923]). The plot - a fading crooner 'borrowing' the voice of a naïve newcomer - is simple enough and has been partly lifted from SINGIN' IN THE RAIN (1952).
While the love interest is more sentimental than usual, since Norman's sweetheart is wheelchair-bound and he wants to make it as a singer mainly so as to have the money for her operation, the film provides plenty of amusing situations highlighting the ageing performer (Jerry Desmonde at his most despicable), ebullient elocutionist Hattie Jacques and long-suffering maitre d' John Le Mesurier; a party sequence halfway through the film also features a surprise early appearance by a dark-haired Charles Gray!