On March 4 a nerve agent was used to try to murder a former Russian spy and his daughter. Initial enquiries centred around the Zizzi restaurant and the Bishop's Mill pub, which had been visited by the pair.
Parts of the town centre were cordoned off by investigators, and businesses across the city reported a reduction in footfall.
On March 21 Wiltshire Council announced a free parking initiative to lure back shoppers and tourists. And the following week a £2.5 million 'recovery plan' was announced by the government.
Now, Salisbury Business Improvement District and Salisbury Chamber of Commerce are polling business owners about the impacts of the attack, and the affects of initiatives like free parking.
The survey asks for evidence that individual businesses were affected by the incident on and after March 4, and asks responders how their March 2018 sales compare to those of March 2017.
Business owners completing the survey will also be asked if their insurance – or that of their landlord – covers them for loss of trade, and what affect free weekday and weekend parking has had.
The survey can be found at www.salisburybid.co.uk