I felt more worried in the 70's and 80's with IRA attacks, but I was younger then and less able to rationalise the stuff I was hearing on the news.
I was born in the 80s but was never that bothered about the threat then unless we were visiting family in NI which was a different ball game.
@spoonbillstretford yes 2017 was a bad year but the Manchester Arena attack did shake me & the foiled plot 2 yrs ago to bomb a hospital also gave me pause for thought. The authorities can't stop every attack & the threat has been substantial for a long time.