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This is Discovery anatomy of touch from the BBC. I'm Claudia Hammond and today we're talking

about unwanted touch and who we do and don't mind touching us and where.

You never really know what's going to happen,

so it's very difficult to describe a typical journey,

but my commute to work is about an hour and ten minutes.

It's a combination of walking, train, bus. There are many kind of

points of interaction where somebody might touch me. I'm visually impaired, I can't see two meters away. So I would be walking to the tube in my local area, which is quite quiet. Normally the start of the morning is fairly peaceful but pretty much from walking into the tube station

that's when the interactions can start. It can be anything from being sort of dragged down a set of

stairs or pulled onto a train pushed into a seat.

Another place it happens very regularly

is when I'm waiting to cross a road in a busy area.

I plan routes specifically so that I can cross at points that are safe and that are familiar.

So I'll aim to use a pedestrian crossing, for example, where there's a button and noise beeping. But when I'm there focusing and

concentrating waiting to cross a road, it's quite normal for someone to, without warning,

without saying anything, to grab my arm and pull me across the

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