The best immigration solicitor depends on your circumstances, such as a family visa, work visa, asylum claim or appeal, so look for relevant experience rather than relying on rankings alone. Check that a solicitor is regulated by the Solicitors Regulation Authority (SRA), or that another immigration adviser is regulated by the Immigration Advice Authority (IAA). Ask about likely fees, timescales, who will handle your case and whether you will receive a written agreement, and be cautious of anyone promising a guaranteed result. You can also compare their advice with the relevant guidance on the official GOV.UK website.