This is fantastic.
From Limmy's Show, it's the Falconhoof Adventure Phone In, which somehow, never ends well. The show pisses all over most of the 'so called' comedy shows that are usually commissioned, as it avoids the same boring middle class problems and overacting.
It's very subtly done, with some great performances by Brian Limond, and, as l have found to my cost (and precious time), there are loads of them on YouTube.
There's also the his website where you can waste more time playing stupid sounds here.