The midges in Scotland are nasty little things.Mainly in the highlands and always on nice calm days. I recommend a net and some Avon Skin so Soft - been using it for years.
If you want to be extra cautious then get some Smidge.
This page will give you some info:
https://must-see-scotland.com/midges-in-scotland
Thanks for that - I’d heard of the Skin So Soft option and have already stockpiled several bottles to take. I’m going to try @DCUKMod ‘s home made repellant too though