Lucy Greenwell

Selina says Jennifer was a good nanny, reliable and loving towards the children.

Gussie remembers Jennifer giving her a little fluffy rabbit as a present.

Is she the only one that made it into the family album?

We had quite a few.

She's joking, I think.

But there were a lot of nannies over the years.

Gussie's number four of the five children.

In the 1980s, our two families were good friends and we'd often come here after school or at weekends.

Gussie and her siblings were brilliantly badly behaved and the whole place crackled with mischief and fun.

I imagine it might have been quite challenging for any nannies with a delicate disposition.

We can't find the photo of Jennifer, but I see glimpses of other nannies frozen in various scenes in this 1980s world.

School sports day, kids' birthday parties, a world that Jennifer would have stepped straight into upon arrival that summer of 1987.

If Selina and her husband went away, 18-year-old Jennifer would be left in sole charge of the children overnight.

And that's what happened on the night of Monday 5th October 1987.

So in this large house there was just Jennifer and the family's two youngest children.

At this point, Jennifer's been working as a nanny here for four months.

Selina arrives back late the next morning on the Tuesday and instantly she notices that something unusual's going on.

But it wasn't a burglary.

There was something far stranger unfolding inside.

In Selina's house, the family nanny always used to sleep in a room that's reached by a small door in the corner of the kitchen and up a narrow set of wooden stairs.