Sorry I didn't realise that you were reading impaired. Silly me.
Try getting someone to actually read you the links that you asked me for, it so much easier than just staring blankly at words wondering in vain, what they mean.
"The night before the Investiture of the Prince of Wales on 1st July 1969,
two young Welshmen blew themselves up, presumably by accident, while
laying an explosive charge at Government offices in Abergele."