Complex sentence: He has also worked with a number of hearing specialists, such as Johnathan Hazell, particularly attempting to help people with Tinnitus, and has attended patients at hospitals including the Nightingale, Priory and Cromwell.
Split into simpler sentences: He has also worked with a number of hearing specialists, such as Johnathan Hazell, particularly attempting to help people with Tinnitus. Roy has attended patients at hospitals including the Nightingale, Priory and Cromwell.