Image: World Economic Forum, Remy Steinegger Image: World Economic Forum, Remy Steinegger

Former Prime Minister Gordon Brown has joined the advisory board of global investment management firm, Pimco.

A spokesperson for Mr Brown said he will take on a "minor advisory role". It was also revealed that any salary will go "to the office of Gordon and Sarah Brown to support their charitable and public service work."

The former PM joins four others in what Pimco describes as a group of "world-renowned experts on economic and political issues".

Former chair of the US Federal Reserve Ben Bernanke, former president of the European Central Bank Jean-Claude Trichet, Ng Kok Song - former chief investment officer of the Government of Singapore Investment Corp sovereign wealth fund, and former US Department of State policy director Anne-Marie Slaughter complete the advisory board.

Pimco's chief investment officer, Dan Ivascyn, said: "The global advisory board is an unrivalled team of macroeconomic thinkers and former policymakers, whose insights into the intersection of policy and financial markets will be a valuable input to our investment process."