"Martin is a slightly fussy control freak and Gerry is a little bit spaced out a lot of the time. He can't remember what he's been doing for the past 30 years."

It's a musical send up of the Peace Process, and in particular of Gerry Adams, who is transformed into a loyalisthugging, bumbling elder statesman with a penchant for breaking out into musical numbers such as, 'Isn't it awfully nice to be a Republican', or duetting with Mary Lou McDonald on 'Summer Lovin'', with lines like, "I met a Shinner, crazy for me."

The germ of the play came about from a camp, cabaret, lounge-singing Gerry Adams who Liam used to play at a monthly revue in Slattery's. He remembers the first moments when he donned the "Gerry beard" and started speaking in those weighty west Belfast tones.

"I realised that I looked and sounded very like him. In fact it was slightly unnerving."

The act grew into a fully fledged, freewheeling musical review, which uses the actual events of the Peace Process as a narrative spine. The show is invested with a Pythonesque sense of anarchic freedom and parodies everything from Broadway musicals to MTV's Cribs. Liam is quick to point out that his company, Volta, doesn't have a political axe to grind, instead, "The focus is on the humour." This humour stems from a very specific sense of irony thrown up by the transforming power of the Peace Process, and of how this is now manifested.

"Suddenly Sinn Fein is all about inclusiveness and there's quite a touchy-feely language to Sinn Fein. So there's a contrast between this holistic attitude and the violent struggle Gerry Adams symbolises for some. That transformation I think is where the chief comedy comes from."

Liam talks about Gerry Adams as if talking about a little brother.

You can almost imagine him ruffling his hair; but then Liam has read all of Adams' books and viewed as many TV appearances as possible. No wonder, then, that at times he talks about him as if he were a close friend.

He is also conscious that something like this would not have been possible 15 years ago.

"We wouldn't have touched it if the Troubles were still going on."

He remembers all too well the "raw emotion" which welled up during Adams' first appearance on The Late Late Show after the announcement of the IRA ceasefire in 1994.

Ultimately it's all about laughing at ourselves. "We want it to be fun for everybody, including Sinn Fein. There is talk that Aengus O Snodaigh may come to see it. I would love to see what they thought of it."

'Gerry and the Peace Process' runs at Players Trinity TCD as part of the Fringe Festival from 11-16 September