A senior police officer in the area of England where the summit has been taking place has thanked campaigners for their "peaceful protests" during the G7 summit.
However, Assistant Chief Constable Glen Mayhew of Devon and Cornwall Police says "robust action" will be taken against anyone looking to cause disruption or disorder.
A police officer working in the South West for the G7 summit has tested positive for Covid-19.
Devon and Cornwall Police said the officer, plus 12 officers who were in close contact with them, are self-isolating.
In the early hours of Friday, the officer received a positive lateral flow test.
The officer was staying on the ferry which was hired to accommodate officers working during the G7 summit.
The next stage is a PCR test and to continue following advice from Public Health England, said Devon and Cornwall Police.
Suppliers from across the South West have been selected to provide local products to the G7 summit.
By Jonathan Morris
BBC News Online