Williams v. Spain
Pham (previously B2) v. Home Secretary
The UK stripped Pham Minh Quang of his citizenship, claiming he was still a Vietnamese citizen and so not stateless. He appealed to the Supreme Court, but his appeal was rejected.
Home Secretary v. Al-Jedda
The UK government stripped Al-Jedda of his citizenship, arguing he could re-apply for Iraqi citizenship and was not stateless. The UK Supreme Court found that indeed he was left stateless.