It's believed work is being carried out at the former home of Christopher Halliwell.
Body found at Sainsbury's, Chippenham
Wiltshire Police have released two CCTV pictures of the car park at Sainsbury's in Chippenham, where a body was found after a fire there this week.
Police have told Heart they are confident they know who the dead woman is and her family have been told.
They say they are continuing to investigate the circumstances of this untimely and sudden death on behalf of H M Coroner for Wiltshire but are no longer treating the death as suspicious.
Her body was discovered underneath debris once the flames had been put out early on Tuesday morning.
Detectives are now hoping people pictured in the CCTV that morning might have information to help the investigation.
One image (left) is of a man who walked through the car park with a bike at 1.54am.
Another (above right) is of a small dark coloured hatchback, whose occupants were seen driving through the car park in the direction of McDonalds at 2.48am.
The fire in part of the supermarket car park was reported around 3am by a police dog handler, who was on a routine patrol.
The body was removed and then taken to Flax Bourton mortuary near Bristol, where a post-mortem was carried out the same day.
The car park was cordoned off that day and the supermarket was also closed, but both were reopened on Wednesday.
Wiltshire Police can be contacted on 101 or via Crimestoppers, anonymously if preferred, on 0800 555 111 .
After Gromit and Shaun, who will feature in the next arts trail coming in 2018?
The Independent Inquiry into Child Sexual Abuse will host the first Truth Project sessions in the South West
Council confirms plans to sell bus operation to a national firm.
Recently Played Tracks
Now playing: Non-stop hit 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.