This is an area that will remain unchanged post Brexit. The law that will govern succession and who will receive your assets on death will not change. The application of your law of nationality has been recognized and formalized in the EC regulation signed by Spain in 2015.
The UK never signed this regulation but because it regulates the law in Spain it will continue to apply to all nationalities including British people post Brexit. Therefore, you can sign a will in Spain electing your national law. This is particularly important where there is a second family or a divorce and you are estranged from your children. In English law you are free to dispose of your assets as you wish. In Spanish law 2/3 of your estate must pass to your children.
Protect your assets by making a Spanish formally valid will. For more information contact us on 952 527014 or email on [email protected]