They'll join regular Kent Police officers from today
Hunt for missing PC from Kent
The disappearance of a serving police officer is being investigated by Scotland Yard's homicide unit
PC Gordon Semple was last seen on Friday afternoon near London Bridge, but failed to return to his home in Dartford in Kent later that night.
The Met officer's partner reported him missing after he failed to return home from work and the last known sighting of him was at 3pm on Friday when he was seen on CCTV on Great Guildford Street near London Bridge.
He had been at the Shard earlier in the day, leaving at about 12.30pm, and detectives want to find out where he went between that time and the last time he features on CCTV around two and a half hours later.
Scotland Yard says the investigation to find the 59 year-old is still a missing person's inquiry, but concerns for his welfare mean the Homicide and Major Crime Command is now leading efforts to find him.
The beaches including Tankerton, Minster Leas and Minnis Bay are some of the cleanest in the UK
It's part of a new Visit Kent campaign at underground and overground stations
The car he was in hit another parked vehicle in Newington last night
Recently Played Tracks
Now playing: The best feel good music
Deposit £10 to get a £40 Welcome Bonus - That's £50 to play bingo, slots and more!*
Over 50 tracks to make you feel-good. New album out now...
Find your local four day weather report here.
What's happening on the roads where you are?
Make Heart the soundtrack to your day and you could be a winner with great prizes up for grabs throughout the day.
Find out more about some of the companies advertising on Heart.
Get some great ideas on how to advertise your business on radio, online and on mobile.