With the rise of fanatical attacks in Britain over the last decade or so we have  seen bombs being aimed at the defenceless, fundamentalists determined to take the lives of strangers, defiance on the streets of the capital but the act of terror has a way of reviving the memory of terror and Britain has faced terror like this before.

In just 12 months during the mid 1970’s 40 terrorist attacks were launched on the capital by a single cell of the Provisional IRA. The aim was to make London life so unbearable that people would demand the withdrawal of British troops from Northern Ireland. For one terrifying year they had it their way until they were trapped in a siege on Balcombe Street. This is the story of the year London blew up.