The strike on the Pivnichnyi (Northern) Bridge comes after repeat attacks on another major bridge in Ukraine's capital.
Researchers are looking at how the natural environment can be used to bolster sea defences.
A temporary airspace restriction will be in place over the Hull Fair site and nearby, say police.
Detailed high-res images are captured without putting staff at risk, the council says.
Such strikes aim to disrupt "people's ability to stay connected, study, work", says Ukraine's president.
Drone testing at an airfield could put the area at risk of becoming "a target for UK enemies", a councillor fears.
Moscow's mayor says 450 drones were downed during the overnight barrage, in which two people died.
Norfolk is one of five counties testing the idea out, but a civil liberties group urges caution.
Police say sending drones to get a first look at incidents could be a more efficient use of resources.
