CR gas, along with CS, VX and other chemical agents, was developed at the MoD lab in Porton Down, and authorised and available for use from 1973 onwards against prisoners in Long Kesh (Guardian). Jim McCann was in Long Kesh during the ‘Battle Of Long Kesh’, when republican prisoners attempted to burn down the cages in which they were being kept in protest at conditions in the camp (An Phoblacht). His memoir, And The Gates Flew Open (An Ceathrú Póilí), continues the campaign by him and other prisoners to get the British to admit that the gas was used on inmates during the riot. The book was launched last month in the Cultúrlann.
In the lower left corner is a quoted telegram from Fr. Denis Faul, Fr. Raymond Murray: “To international Red Cross … Visited Long Kesh today with others … Request immediate investigation into use of CR gas … sub-human conditions … SOS … come immediately …” 20 Oct. 1974. These two wrote an 80-page report on the conditions at the camp following the event, entitled The Flames Of Long Kesh.
For more information, see the post on the similar 2014 mural that marked the 40th anniversary of the battle. For in-progress shots, see yesterday’s post.
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text: X06043 X06041 X06040 X06042 divis st
Extramural Activity 
where can I find the mural?