What happens if my Responsible Person leaves or the arrangement ends?

That's a legitimate concern. The straightforward answer: you need a replacement fast. There can't be a gap where no accountable contact is available to regulators. Most service contracts have three- or six-month notice periods — some offer month-to-month terms. When the partnership ends, you should already have a new Responsible Person named before your current one steps down. Some providers also help with the transition and hand over your documentation. Recommendation: clarify these points before signing your contract, not when you're under time pressure.