The young DC came out from Langton's office which faced the Incident Room and so had blinds for privacy. Anna watched as the DC filled three mugs with black coffee and a plate with doughnuts.

'Good-looking, isn't he? Nice suit,' she said.

Anna smiled. 'He hates his coffee cold. If that's stewed, I'd get the canteen to make a fresh pot.'

'So you've worked with the DCI before?'

'Yes, a while back.'

'Is he married?'

Anna turned away. 'Not as far as I know. That coffee will be cold if it wasn't before.'

As the young DC moved off, Anna looked over to the officer working at the next desk. 'What's her name? I keep forgetting?'

He didn't even look up. 'Bridget; like the diaries.'

Anna smiled. The young DC was slightly overweight but very pretty, with silky blonde hair, unlike Anna's own spiky red. Anna had tried to grow hers longer but it didn't look right, so she had gone back to her usual cropped cut which held in check the curls that liked to spring up.

There was a strange atmosphere in the Incident Room. Langton's remark about their lack of results had hit home and the team were feeling out of sorts. Nevertheless, Anna worked at gathering names and addresses of Louise's known associates and, along with the rest of the team, began arranging interviews. Her first priority was to go to Louise's flat to reinterview Sharon herself.

Louise had lived in the top-floor flat of a narrow four-storey house off Balcombe Street, close to Baker Street tube station. Anna paused to catch her breath; the stairs were steep. The staircase narrowed as she approached flat nine. She knocked and waited.

'Come in,' Sharon called out. Anna pushed the unlocked door open. The small hallway was as narrow as the stairs and was crammed with photographs of Sharon, some of her modelling teenage clothes and others in which she was rather more scantily dressed. There were none of Louise.