Allowing other operators such as cross country, Heathrow express and connect, south western railway to add diversity to the railway this is just an example for the great western DLC, this would be a major project for all dlcs
Heathrow connect enters TfL ownership in May this year and Heathrow Express is being incorporated into GWR - so the lack of licensing should be negated by the end of this year. Especially with TfL and GWR having seemingly good relationships with DTG