If and when there is another attack it could be absolutely anywhere in this country. Ok it is more likely to be in a city but it could be anywhere. Any shopping centre, any concert, anywhere there is a large number of people.
We could all stay indoors but many accidents happen in the house. We could step outside the door and get run over. None of us know what is in store for us. We get up and just expect we and our loved ones will make it through the day but many do not.
Far far more people die from road accidents, heart attacks, strokes etc. The odds are far higher for any of those causes of death/injury than a terrorist attack.
I too remember the IRA attacks only two well. Our windows were blown out by an IRA bomb going off close by when I was young - we lived in London. It was a regular thing to be evacuated from the office I worked in because of bomb scares and from train stations, tube station, shopping centres etc.
I didn't change my life in the slightest then nor will I now. I don't live in London now but go regularly with OH (at least once a month).
I do understand how people with children fear for their safety and future but there are many more things to worry about in that regard than terrorists