PS If the UAV is the Cyberflight Super Swift Eye, then it only weighs 2.5Kg so only Article 74 would apply. If it's their SkyRover, then there's no specification data on their sparse website.
The CAA UAV documents don't add much more unless the UAV weighs more than 20Kg.
Presumably Cyberflight Ltd's operating procedures for these UAV's would include the requirement to notify the relevant ATC unit of the position, radius of operation and maximum altitude on each occasion, even when operating in the open FIR as is likely if based at Oban.
Scottish Information (in this case) would then pass this on to affected aircraft. In an ideal world!
Probably not a requirement if the above assumptions are correct. As there is no Controlled Airspace there, there is no 'control' agency permission needed. The SAR authorities might establish a Temporary Danger Area, as they do on occasion today, but this does not exclude other traffic from the area. It would only allow someone such as Scottish Info to warn you that you might encounter SAR activity (ranging from our small drone to a large helicopter or even a Nimrod).