Welcome to the Forum Catherine 
I’m sure you will find plenty of people in the UK who would love to spend 6 months in Lanzarote (me included), especially if the 6 months is over the winter! Please do share your link here for others to see. There are also other posts for long-term exchanges such as this 🎤 🏠 Open Mic – Long-Term Exchanges (1 month or more)