Totally Tom are probably the most enthusiastic performers you are likely to find at the Fringe this year, and the most expected to be make the transition from leaky cave venue to the bright lights of your television screens. Having been given a spot on Channel 4’s Comedy Lab in its next series, this posh pair is forging their way to success, one audience at a time.

Both attended Eton, so it’s unsurprising that their style of humour is of the ‘gap yaah’ variety: gay innuendos and upper-class hijinks abound. But, far from being obnoxious and exclusive, they produce sketches that are genuinely funny and as quick to lampoon those with plums in their mouths as idolise them. Their revival of the dated best-man-speech-routine (in the form of ‘Poppy’s 21st Party Speeches’) is a stroke of genius that sends the audience into hysterics.

When these boys are at their best is when they are performing their own unique material, not when they are rehashing the age-old anal jokes. The tale of the downtrodden and inarticulate minstrel Shmolio illustrates this very well. They have plenty of material but it needs to be refined and polished. If they do make it big one hopes the full potential of their agile wits and originality will be fostered and not sacrificed for easier, banal ladishness.

Totally Tom, Underbelly, 4-28 August (except 15th), 3.45pm