Of the eight routes identified in post 1 of this thread:
- Wigan – Victoria
- Stalybridge –Southport
- Glossop – Hadfield – Piccadilly
- Rose Hill – Piccadilly
- Buxton – Piccadilly
- Alderley Edge – Piccadilly
- Rochdale stopping services
- Manchester Airport stopping services
So four (as defined in the press release) operate solely within Greater Manchester, two have short extensions outside the county into neighbouring authorities, and two have longer extensions outside the county into one or more neighbouring authority. The first two groups would I suspect be relatively easy to manage. The third group would appear to present something more of a problem, but would Merseyside, Lancashire, Cheshire East, and Derbyshire really be that concerned about TfGM running services in these areas, given that Disley, Burscough, Southport and Buxton are all relatively peripheral to their own economic and populations centres? Derbyshire Council for one have co-operated with Greater Manchester before, for instance on the South East Manchester Rail study which focussed on these lines, so it doesn't seem that implausible that they would do so again.