As with Airbnb globally, whether a UK listing welcomes pets is the individual host's decision, stated in the listing's House Rules section. Many UK hosts do welcome pets, reflecting the country's broader dog-friendly culture, but it's never guaranteed by default, and some specifically exclude them, particularly for shared properties or listings with delicate furnishings.
If the listing is silent on pets either way, message the host before booking rather than assuming. UK hosts can and do decline or cancel a booking if an undisclosed pet turns up, and Airbnb's standard cancellation terms rarely favour the guest in that situation.
Ask specifically about any pet cleaning fee, whether the property has secure outdoor space, and how close it is to a park or dog-friendly walking route — details that matter more in a self-catering stay than they would at a hotel with its own grounds.