SNP MP Pete Wishart is set to publish his manifesto in a bid to become the next Commons Speaker at Westminster.

The Perth MP shared a Tweet on Tuesday evening declaring his plans, and promising that a "substantial & far reaching" manifesto would be released on Wednesday.

If successful, the backbencher would become the first post-war speaker who did not hail from the two main parties.

He tweeted: "Tomorrow I will release my manifesto to become the next Speaker of the House of Commons. The first post war Speaker to emerge from beyond the 2 main parties. It will be based on a solid agenda of reform seeking to secure equality of all MPs. It will be substantial & far reaching."

However, his announcement was met with anger and scepticism from some SNP supporters who felt this move would ingrain the party within the Westminster establishment instead of working to escape it.

John Bercow, the current speaker, was expected to stand down over summer, though with the impending chaos of Brexit it is unclear if that may change.