Mind Your Language S1, S2 and S3 - https://archive.org/details/mind-your-language-s-01-e-02-an-inspector-calls.

Come Back, All is Forgiven

It is Mr Brown’s birthday, and everyone in the class has brought him a present - but it is not all happy returns when Miss Courtney informs him that his trial month is over and dismisses him, replacing him with a new teacher.