Yes Raindog, I know about that. But whilst the Act makes it possible to revoke British Citizenship for an individual who has dual nationality - British and another nationality, as in the case in the article - it is not possible to revoke British Citizenship where that is the only nationality held.

Jamima Begum was born in the UK and has only British Citizenship, under the British Citizenship Act 1981, it cannot be revoked, because to do so would render her 'Stateless'.

http://researchbriefings.files.parliament.uk/documents/SN06820/SN06820.pdf