Provider of IPTV

You can get the main Free to Air UK TV channels from your Spanish internet, just pay for a VPN which routes your signal via a UK locations lifting the GEO blocking. Some facts about IPTV link below.  UK streaming channels sold via IPTV providers an illegal bootleg service which can be shut down.   

OliveNet informing users cancelling IPTV service from June 1st - VPN - Broadband Internet, Wifi, Phone and TV in Málaga - Málaga forum - Costa del Sol forum in the Malaga province of Spain

There's an article about VPNs here. It's worth reading because using a VPN is not illegal.

I can recommend NordVPN. They went to great lengths to ensure my PC settings were appropriate to getting the best connection. 

I never posted VPN's were illegal, in fact, what I was recommending, I was just warning about sellers of IPTV services.  

I did not suggest you posted that VPNs are 'illegal'.  But, it is a commonly held view promoted by rights holders and debunked by the article I referenced. Apologies if you were upset by my post.

Best wishes

Some rights holders like Netflix do block known VPN's, 'which is their right to do', however, where it does become illegal, selling on the streaming content, which does take place with many IPTV operators. Some internet sellers have been piggy backing channels in their bundles, recently some stopped and people lost service. It's always rights holders who put pressure on broadcasters, the reason many TV channels like BBC lost in South of Spain and moved to Astra northern spot beams. At some point the same could happen with popular VPN's and pressure put on people like the BBC to block like Netflix. It might be worth adding, fixed priced VPN's steaming limit data and at times, when busy, can effect data and limit quality, also sometimes causing buffering. (Professional ones like Amazon Web Services, AWS, charge for data used and no bandwidth limitation). For now the cheap VPN's a great way to get UK TV without the need for a risky IPTV seller. 

You can have someone in UK to program your IPTV and use it wherever you go via internet.

The IPTV box would need to trunk via a VPN Server, with a UK location, or would geo blocked. 

You don't need VPN just internet connection.

IPTV no different from any other internet receiving devices, they need a VPN service to receive Geo blocked streaming. It's true the box will just work for local FTA non geo blocking stations. 

https://cybernews.com/best-vpn/vpn-for-iptv/