Hywel qualified as a solicitor in September 1996. He practised in various areas of civil law, before specialising in personal injury law. Over the last 15 years he has focused on representing people who have suffered sexual abuse and assaults and obtained damages for them for the psychological harm suffered. He has worked for firms with a national and international profile for this area of work. He has also given presentations to various groups in relation to the issues raised by this type of work, and has also been quoted in the national press on cases he has worked on. Hywel has been a trustee at 42nd Street since 2014.