There is never a guarantee, but you can apply for a 5 year or 10 year visitors visa, which means you do not need to always apply for a visa each time you travel and allows you to visit for up to 6 months.
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How can I continue traveling to the UK visa-free as a Dominican citizen?
I’m a citizen of Dominica and used to regularly travel to the UK to visit my daughter who lives there. Now I can’t travel without needing a visa so I’m wondering if there’s a way to guarantee I get a visa for an extended period of three years or more, so I don’t have to keep applying for it frequently? Is there a special pathway for a situation like this?