Special 25
At Aberdeen the 3 Operators are in constant contact with each other and the ATC.
I do not want to upset my bosses by explaining details but they are doing their best to provide a service whilst at the same time remaining in strict compliance with the Engine Manufacturer's guidlines and the notam VAACs information.
The start/stop you are witnessing is a direct result of the changing shape of the NOTAM and VAACS dispersion charts.
There is no option but to remain within the current guidelines.
Hope this helps
DB