Nobody has mentioned weather. Based in Scotland (me too) plan on a dispatch rate of 20% for VFR and 80% IFR for a 150 mile trip. Nov-Feb maybe 5%. Is this practical for business use?
I would suggest renting for a while, probably a 4 seater is all that is available, and see how that works. Your decision on a suitable aircraft will definitely mature in that time.
Best of luck. Probably speak to you soon.