Grand Theft Auto. In the UK, theft is defined as the unlawful appropriation of property belonging to another with the intention of permanently depriving them of that property. Theft Act 1968, Section 1 Legislation.gov.uk https://www.legislation.gov.uk › section › 1 (1)A person is guilty of theft if he dishonestly appropriates property belonging to another with the intention of permanently depriving the other of it.