In Trespass Mark asks the question:
"If the ramblers of the 1930s were here now, what would they do to open up the cities?
"How do we turn the skyscrapers and corporate squares into our playgrounds?"
Inspired by the mass trespass of Kinder Scout in 1932, Mark turns his eye to how the government have sold off the majority of our communal spaces, from playing fields to public rights of way, setting out to try and carve a small space in the urban world where mischief and random chance can lurk.
Mark's shows have always been entirely different from each other; he's stopped arms deals, created a manifesto and brought the winning policy to parliament, walked the entire length of the Israeli wall in the West Bank and most recently completed 100 Acts of Minor Dissent, which included taking the police to court over surveillance and finding a new definition for the word 'Farage'.
"I'm sick and tired of this fucking little Englander fucking awful mentality that says "because I haven't got something then stamp on the foreigners".
When people go "we just want a serious debate" - you don't want a serious debate, you are just mongers of fear..
"What I would do if I could is I would just make everyone in Britain black. I'd change the language to Arabic... and then step back, ha ha."
In 2012, Mark's first ever one-man theatre piece, Bravo Figaro, a touching and poignant tale first commissioned by the Royal Opera House about his opera-loving father which sold out its entire Fringe run, won Mark awards as well as a broadcast on Radio 4.
"Once you start going to see this stuff, you discover — and of course, it"s stunningly obvious — that just because you like some opera it doesn't mean you like all of it."
This year the show toured Australia and New Zealand with Cuckooed, his second theatre piece.
Mark collected the Amnesty International Freedom of Expression award, an honour for which Mark declared was 'a very inspiring experience and I feel very humbled.'.
Fortunately, he has just enough bastard in him to prevent him from becoming a national treasure.
Mark Thomas presents 'Trespass' at The Old Market, Hove, on Wednesday 16th September 2015. See theoldmarket.com for more information.