I was one of 113 academics to sign a letter criticising the Conservative Government for its continued ideological pursuit of austerity. The letter was published on November 20th 2017 and was entitled, 'The Chancellor Must End Austerity Now - It is Punishing an Entire Generation'.
I was one of the 56 academic supporters of the Trade Justice Movement to sign a letter criticising the UK Government for so far refusing to stipulate how post-Brexit trade deals are to receive the assent of Parliament. The letter was published on October 20th 2017.
It can be found here, albeit quite a long way down on that day's published list of letters: http://www.telegraph.co.uk/opinion/2017/10/20/lettersif-brexit-negotiations-fail-big-risk-comes-staying-eu/.
I was one of what the Guardian described in its front-page report on June 13th 2015 as "77 of the best-known academic economists" to sign a letter criticising UK Chancellor of the Exchequer George Osborne's plans to enshrine in law permanent budget surpluses. The letter accuses Osborne of ignoring "basic economics".
It can be found here: http://www.theguardian.com/politics/2015/jun/12/osborne-plan-has-no-basis-in-economics.