What precisely was hidden in the sink? It’s probably better left unknown as we are introduced to the alcoholic "Withnail" (Richard E. Grant) and his slightly more presentable friend who serves as “Marwood/I.” They are two actors between engagements, completely broke. A trip to visit his uncle "Monty" (Richard Griffiths) provides them with some good wine and a key to his secluded country cottage, where they decide to spend a holiday. They don’t quite belong, and their lack of money, firewood, fuel, or general competence only serves to irritate the local people. The fresh air of the countryside—and the constant rain—aren't suited for them, and things go from bad to worse when "Uncle" arrives and seems rather taken with the plainly frightened "Marwood"! What unfolds afterward? The initial hour is thoroughly entertaining, with Grant and McGann’s performances working well together, showcasing a clever and witty script full of quick remarks and understated humor. I'm not entirely certain how much acting Griffiths was truly doing here, but he consistently steals every scene—particularly when he corners his would-be, hapless victim during a thunderstorm! Credit also goes to their friend "Danny" (Ralph Brown)—a sort of city person who is perpetually stoned! The cast feels very connected, and while the film does lose some momentum toward the conclusion, I believe it remains one of the finest portrayals of comedy that captures an aspect of 1980s Britain, avoiding obvious criticism of Mrs. Thatcher but still providing a sharp look at how hope is overcome by reality. It has aged well and continues to be enjoyable!

Source on TMDB