No. There is no internal medicine specialist like that. IMT training makes you an acute medical registrar who then can apply for specialization in different branches of medicine. You can apply for Acute medicine as your specialization (for 4 years further), which will make you an Acute Internal Medicine (AIM) consultant. Some (almost all of them) specialization pathway comes with a competency module for general internal medicine (GIM) as well. So a fellow/trainee who is in specialization pathway to become a respiratory medicine consultant, they are also becoming a general medicine (GIM) consultant. Please watch this video on cardiology career to understand it in a more detail - How to become a cardiologist in the UK.