Patrick is Co-Convenor of the Scottish Green Party and has been an MSP since 2003.

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He is a member of Holyrood's Finance and Standards committees.

In previous sessions of Parliament he served on the Economy, Communities and Transport committees. He has been involved in a range of issues, from asylum and civil liberties to sexual health and food policy, and was a prominent campaigner for Yes during the independence referendum.

In the last session of Parliament he led the Better Buses public transport campaign, the Rent Rights housing campaign (resulting in rent controls being included in legislation) and he took forward Margo MacDonald’s Assisted Suicide Bill. He lives in Glasgow and is a big fan of craft ale.