[2] He is most well known for his arrest on 29 January 2017 at Warton Aerodrome, Lancashire on suspicion of criminal damage after attempting to "disarm war planes" which he believed were bound for Saudi Arabia.

[7] On 30 March 2017 Walton attempted a citizen's arrest on Ahmad Asiri who was visiting London, citing accusations of war crimes in Yemen.

[8][9][10] Due to the protests and attempted arrest, the UK Foreign Secretary Boris Johnson phoned Saudi Arabia's Crown Prince Mohammed bin Salman to apologize.

[14] In October 2017 Walton and Woodhouse appeared at Burnley Magistrates court facing charges of criminal damage; both were found not guilty after successfully arguing that they acted for the greater good.

[22] On 26 April 2012 Walton interrupted the Business Secretary Vince Cable's address at a UK Trade & Investment Defence & Security Organisation (UKTI DSO) Symposium.