If you've purchased a property with a long-standing rented shop and need the tenant to vacate, you'll likely need to take legal action. The first step is to issue a formal legal notice to the tenant, stating your requirement for personal use and demanding they vacate, along with any outstanding rent. If the tenant doesn't comply, you can then file an eviction petition with the Rent Tribunal or Civil Court, citing personal necessity and/or non-payment of rent as grounds. Consulting a local solicitor experienced in rent control laws is highly recommended to navigate the process effectively.