Rosenthal, who is most famous for playing practical joker Jonny Goodman in the Channel 4 sitcom Friday Night Dinner, took the mic at The Three Tuns on Friday, returning to his home county of Berkshire.

And it seemed Rosenthal, from Cookham Dean, had certainly gathered plenty of anecdotes from touring and filming as a comedian and actor in Bulgaria.

These ranged from gags about the direct nature of the Eastern Europeans or their lack of cheese options to him reading out suggestions for new Commonwealth sports, which included periodic table tennis and ‘park-or’ – where the first blindfolded contender to decide if they’re in a park wins.

Rosenthal plays up to the self-conscious and nervous geekiness, which contributes to his absurd and eccentric anecdotes.

He finished his set with a fiercely energetic sketch about his girlfriend’s shower, acting out the various toiletries.

His impressions of the posh and snobby Molten Brown, the stereotypical Ozzy of ‘Aussie’ shampoo, and the huge and scary bottle of Tresemme ¬battling it out for his attention left the audience in fits of laughter.

Ending on a high note, Rosenthal welcomed fellow posh boy, or as he described ‘someone so posh even Henley Regatta rejected him’, Ivo Graham, to take over.

The boyish 23-year-old got the audience laughing straight away with a funny interaction with Rosenthal’s friend, Chris, in the front row.

A competitive quiz ensued over who knew Rosenthal better – which completely interrupted Graham’s first essex-related anecdote – but it didn’t matter.

Graham’s theme was his coming-of-age, transforming himself from a geeky Eton College boy to someone who, like Rosenthal, now had a ‘consensual girlfriend’.

He embraced his geekiness, and privilege was also high on the agenda as he spoke about learning Latin and Greek and his proficiency for writing thank you letters to parents.

He was aware that he was pitching to the right audience, but remarked that he might not fare so well in Middlesbrough next week.

Having won the So You Think You Are Funny award in 2009, Graham still had the attitude of the modest underdog, which served him well.

His awkwardness means his jokes about virginity and sex are received well by everyone – but it’s okay because he’s turned his life around and has emerged into a butterfly, or as his brother tells him ‘into a less ugly caterpillar’.

Both comedians will be leaving the Home Counties and appearing at Edinburgh Fringe Festival next month.

Henley Fringe Festival features comedy, drama and film at various locations around the area, until tomorrow (Sunday).