There was a thread a few days ago about a lawsuit against the National Association of Realtors, who are usually the largest part of these transaction costs.
Population density, growing market, supply/demand.
If you're close to the center, it's more expensive.
What kind of area do you live in Scotland?
Edinburgh City Centre. I was referring to the fees being such a large % of transactions. Both my properties cost 1-2% in total fees.