More than seven weeks since the Salisbury nerve agent attack, work has begun to decontaminate nine areas of the city which experts believe traces of the agent still remain.
Former Russian spy Sergie Skripal and his daughter Yulia were poisoned with Novichok - a military grade nerve agent developed by Russia.
The multi-million pound operation could take months to complete.
These are the scenes around the bench and The Maltings shopping centre at which the pair were found collapsed and unconscious on March 4th:
Specialist teams are focusing on nine areas - including Sergei Skripal's home in Christie Miller Road, the Mill pub and Zizzi's restaurant where they were shortly before collapsing.
Alistair Cunningham from Salisbury Recovery Coordinating Group says