I needed it on the day and nowhere local had the Makita. The Stihl came with one battery and charger for £230 where as the Makita would be order in for £260 with no batteries. I don't like buying tools of the internet if I can help it because it's a pita if they break. Hit a screw with it today so it's not cutting so nicely now
Any Stihl dealer has to work on any warranty repairs, no matter where the machine was bought from. Not sure about Makita, but the one time I've needed it their service was UNBELIEVABLE. Impact wrench collected from my house and delivered with new motor the next day. I've still no idea how they managed it without a time machine.
The makita should be £150+VAT (£180) with no batteries. Start buying online- you're robbing yourself if you don't, especially stuck on that poxy island

As for the chain- Rotatech chains from Northern Arb Supplies. Will be under a fiver for that size bar, and they are genuinely decent chains, I use them up to 36". Start buying online!