An incident at his school when he was a teenager, which the court heard was a chlorine attack on an assembly, had only involved a test tube and no-one was hurt, Mr Railton said.

BBC: Man denies 'planned poison attack on bus' in Surrey

The attack was later criticised by the Rangers Supporters Assembly, the umbrella organisation representing fans groups across the world.

BBC: Smith wary of Ibrox fans' protest

Ulster Unionist assembly member Rev Robert Coulter condemned the attack.

BBC: NEWS | UK | Northern Ireland | Church attack 'linked to parade'