Look for a solicitor regulated by the Solicitors Regulation Authority (SRA) who regularly handles your visa category and understands your circumstances. Check their experience, client reviews and whether they will deal with the application from start to finish, including supporting documents and correspondence with the Home Office. Ask for a written breakdown of fees, likely additional costs and what happens if your application is delayed or refused. Be cautious of anyone promising a guaranteed visa or outcome. You can verify a solicitor through the SRA, or check the Immigration Advice Authority register for other regulated immigration advisers.