Radical Independence Scotland and friends will be outside the Spanish embassy in Edinburgh, all of Sunday; we absolutely support your right to self determination as the Catalans did during our recent bids for independence. Solidarity, comrade.
It's not often I find myself agreeing with a UK unionist but it's a point of honour that the Scottish referendum 2014 passed off largely as an orderly point of democracy. Westminster is often seen as heavy-handed North of the border but everyone is proud of that expression of democracy (however there are still words to be had about subsequent political events!).
I'd be interested in any way to help out too. As part of the Scottish independence movement, our Catalonian counterparts are comrades & allies. Other than solidarity protests over here, I'd love to help in some way.
https://en.wikipedia.org/wiki/Swiss_cheese_model