SEARCH and rescue teams are currently in place in Churchill Gardens, with a base of operations set up in the car park. 

UPDATE:  Police confirm Churchill Garden searches for woman missing since Friday

Teams from both Wiltshire and Hampshire Search and Rescue - along with Wiltshire Police - have closed off the car park for the whole day to "allow for site investigation", according to paper notices at the car park entrance.

At 11.54am, Wiltshire Search and Rescue said via a Facebook post that the activity was in relation to the continued search of a "high-risk missing person".

Salisbury Journal:

Water-based search and rescue teams have been in the River Avon.

Salisbury Journal: Search and rescue preparing to head into the River Avon

Wiltshire Police has been contacted for more information. 

UPDATE: This article has been updated from its original version to include information that the search is in relation to a 'high-risk missing person', following the release of this information by Wiltshire Search and Rescue.