You are advised to make a will. The British Consulates in Spain have a list of English-speaking lawyers who may be able to help

All expatriates are advised to make a will, as intestacy can cause great difficulty to heirs.

We understand it is acceptable to make a British will for any property or assets in the UK, and a Spanish will for property or assets held in Spain. However, Spanish law is complex, and differs considerably to English law, so professional legal advice should be sought on all aspects.

The British Consulate can provide a list of English-speaking lawyers who may be able to assist.