You shouldn’t be intimate with someone in any way without first making sure they are comfortable with it. Consent must be obtained for each type of sexual activity, as well as each sexual encounter. Giving consent to oral sex, for example, does not mean consent has been given for vaginal or anal sex.
Touching someone in a sexual way without their consent could be classed as a criminal offence under the Sexual Offences Act 2003 – it could lead to a maximum of 10 years’ imprisonment.
Giving or receiving oral sex or engaging in penetrative sex without consent is a crime and could be treated as either rape or assault by penetration, which both carry a maximum sentence of life imprisonment.