From The Times and the Sunday Times, this is the story.

I'm Jane Mulcairons.

Two years ago, in a leafy suburb of North London, on an otherwise ordinary day,

Jenny Clemen was at home,

about to take a test that could change the fundaments of what she knew about herself.

I was sitting exactly where I'm sitting right now, Jane, talking to you.

I took an ancestry test and a 23 and me test for my radio show. They both came in these very

enticing little boxes, opened up the box, and you have a kind of little plastic vial

that you're supposed to fill with saliva up to a certain level and you think that should be easy.

But I was recording myself doing it at the same time and I suddenly

had an incredibly dry mouth. It was very difficult to produce that quantity of saliva.

It's the pressure. It's the pressure. And there were lots of bubbles and you had to make sure

it wasn't bubbles. It specifically says in the, in that. So it's not as simple as you might think,

ah, you spit into a tube. You send it off. No, you have to really, really produce a lot of saliva.

Seal the little test tube up, put it in the mail bag, and send it off.

And then you get all of these text updates that are really enticing.

You get one saying, we have received your sample.

And then one a week later saying, we are analysing your sample,

and then you get one telling you that your results are going to be ready soon.

And then eventually, after a few weeks, an email drops into your inbox with the result.

Millions of us have done similar tests, around one in five Britons and I'm one of them too.

And we do it to find out things about our health or where we come from.

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