During the summer of 1974 the IRA launched a string of attacks in England , which included a letter bomb campaign and the bombing of Westminster Hall . On 5 October 1974 a new , more intense bombing campaign was launched in England by the IRA Active Service Unit known as the Balcombe Street gang with the bombing of two pubs in Guildford , killing 5 people and injuring 65 others
bombing of two pubs in Guildford
Guildford pub bombings
Harrow School bombing