[4] In April 2018, he was fired from the League Against Cruel Sports (LACS) after he disclosed to his colleagues that it was investing in firms related to animal testing.

[6] The landmark case confirmed that ethical veganism is protected under the Equality Act 2010 in the UK as a philosophical belief.

[12] Casamitjana was one of the expert witnesses before several parliaments during the debates that led to the successful passing of animal protection legislation.

[13][14] On 22 October 2014, he spoke before the Commission of Agriculture, Livestock, Fisheries, Food and Environment of the Catalan Parliament for the ban on wild animals in circuses.

[15][16] On 13 November 2016, he spoke before the Climate Change, Environment, and Rural Affairs Committee of the Welsh Assembly for the ban of snares.