I am a British citizen, living in the UK, working for a UK company. We have an office in Spain, and I'd like to work in the Spanish office where the rest of my team is based for 6 weeks taking my spouse and kids with me.
Which visa would I need for this?
I know I'll not be earning
Spanish income, and will be there for less than 189 days for tax purposes, but is this a valid use of a tourist visa?