Reuniting for their potential ‘final’ Edinburgh Fringe run (again), Liam Williams, Alastair Roberts and Daran Johnson (the most peculiar boyband trio of the sketch-comedy circuit) warm up those awful but delightfully humorous singing voices. And this year, the fan-favourite Sheeps have called their show The Giggle Bunch in the hope that this is precisely what the audience will be. Bold, though not inaccurate. 

There’s tremendous freedom in what the group can achieve, perhaps too much freedom. The uniquely random and surrealness in the Sheeps’ sketch show can strike lucky or fall limp. It’s comedic charcuterie: there’s plenty to pick from such as the culture wars, paternal relationships, clown-murderers, the ‘gay agenda’, and hell, even the Prime Minister makes an appearance. And for every joke you don’t like, there's more for the people who do. 

Musical interludes and character comedy skits work a treat, while the more sporadic and leftfield moments have the scent of something cooked up shortly beforehand. For many in the audience, that’s the charm of the Sheeps: the unshackled nature of a show away from the mundanity of rigid (and obvious) narrative set-ups. When it lands, the laughter tumbles out with ease and carries momentum. If it dips, familiar fans pick up the slack and trundle us to the next routine. There are few sketch-comedy groups with as gutsy an attitude to bounce this many ideas around and still hold their reputation.

Sheeps: The Giggle Bunch (That’s Our Name For You), Pleasance Courtyard, until 26 August, 8pm; 7 & 8 August, 6pm; Pleasance Dome, 17 August, 9.50pm.