Hello! Yes, both 'play truant' and 'have rows' are still commonly used in the UK. 'Play truant' refers to the act of skipping school without permission, and 'have rows' means to have arguments or disagreements, typically within a relationship or household. While these phrases may not be as frequently used in everyday conversation as some other expressions, they are still perfectly understandable and used by many people, especially in more formal or written contexts.