“We will review overnight whether there is any potential to open tomorrow, ” he said.
“But we are working up contingency plans all the mode through to no flights tomorrow.”
‘Closed for the foreseeable’
Speaking at 21:30 GMT, he said the situation remained “fluid”, as the droning had been spotted again less than an hour earlier.
Police have been locked in a game of cat and rat with the drone, and have received about 50 reports of the device being piloted near the airfield since Wednesday evening,
No detains ought to have obliged, and the airport is expected to be closed for the “foreseeable future” while the hunt for the hustler continues.
Those due to travel on Friday have been urged to check with their airline before arriving at the airport.
Det Ch Supt Tingley said police did not know the make and framework of the drone, but supposed it had been “adapted and developed” with the intention to cause disruption.
Officers had, however, deduced “certain specifications” such as the device’s length, he said, and suggested anyone with pictures of the droning to contact police.
Gatwick disruption: As it happened
After other strategies to bring down the droning neglected, Det Ch Supt Tingley said, such forces was reconsidering plans to shoot it down.
He said police were also following lines of probe, including “particular groups” and a “number of persons of interest”.
Defence Secretary Gavin Williamson approved members of the military deployment on Thursday evening.
He said the armed forces had a “range of unique capabilities” and would “do everything we can so that they are in a position to open the airport at the earliest opportunity”.
Men in military uniform were recognized arrived here the airport at about 20:00 GMT and liaising with police officers, before participating the soils in convoy.
How countries counter the monotone threat How can a drone cause so much chaos ? Gatwick Airport disturbance: Your privileges Image caption A total of 633 flights have been cancelled Image caption Geoffrey Grove is trying to are going to the Swiss Alps with his wife and five-year-old twins Image caption Flights were diverted to other UK airports as well as Paris and Amsterdam Media caption“With most monotones the batteries will last for only 20 minutes”