ATP???
SE-???? hmmmm.......... = NEXJET SE-Mxx or WESTAIR = SE-Lxx so possibly Gothenburg or Malmo or Mariehamns
Doesn't look much like Gothenburg -Landvetter and not sure you could get that close to the hangars there outside the fence.
Marienhams is in Finland which it can't be according to Jensdad
Malmo is possible??