Do I need a UK TV Licence to watch UK TV in Spain?

There is no TV licence scheme operating in Spain.

A UK TV licence is only required for property in the UK.

Paying for a UK TV licence does not automatically give you the right to be able to receive UK TV channels outside the UK.

More information on TV Licencing in Spain : https://www.satandpcguy.com/uk-tv-in-spain/tv-licence-in-spain/