If you are hoping to sell your property to another landlord or you are paying any mortgage/finance on the property, it is usually better to leave a tenant in situ and sell it as a tenanted investment. By doing so, you will benefit from receiving rent through to the day of completion and the new buyer will start taking rent from completion.
If you intend selling to an owner occupier, or if the property requires refurbishment, you may wish to serve notice and be able to sell your property with vacant possession. You should consider both, and we recommend that you take advice from the auctions team who are capable and experienced in selling both tenanted and vacant.