I was working in an office in central London. My mum had just called me and moments after she called it came up on TV (which she had on while talking to me) and she went quiet for a moment, then started telling me what was happening, the original purpose of the phone call forgotten.

I relayed it around our office - no one else had heard yet, and then kept emailing updates as most of the news sites weren't working (overloaded we assumed) and the only radio we had was down our end of the office.

I remember there being a feeling of terror in the office, as there was was this feeling that London could be targeted too, as well as a feeling of disbelief.

We were told we could go - but most of us stayed for much of the day for fear of what might happen on the underground (I have a feeling the underground may have ended up closed anyway) a few with partners working nearby left to meet up with them though. When we did leave it was in groups of people who lived close to each other - no one seemed to want to be alone.

Or receptionist was in a bit of a panic too, as she knew her parents were either in or going to NYC that day and she couldn't get hold of them and she was sure they were going to be staying at the WTC - it turned out that they were waiting at the UK airport for their flight to leave (obviously never did).