Scottish politics.But the Scottish Greens co-leader will join Nicola Sturgeon, Anas Sarwar, Douglas Ross and Willie Rennie for the first election debate of 2021 live on BBC One tonight.Co-leader Patrick Harvie is the most high profile Greens MSP and has been a mainstay of politics in Scotland for a number of years - but not much is known about Slater in comparison.She did however appear on the BBC's Andrew Marr Show on Sunday it what was her first major TV interview.So, what do we know about