Network Rail's position was stated in a letter on the ORR website that you linked in your previous post:
https://orr.gov.uk/__data/assets/pdf_file/0003/41277/nr-letter-orr-emt-directions-2019-06-07.pdf
So NR is supportive of contingent rights for EMR through the Castlefield Corridor until at least May 2021.
The EMR service is not uniquely vulnerable; the following Northern services that interface with the Castlefield Corridor are currently operating under contingent rights that expire in May 2020:
- Manchester Airport - Barrow/Windermere
- Manchester Airport - Liverpool via Warrington Central
- Leeds - Chester/Ellesmere Port*
See
https://orr.gov.uk/__data/assets/pd...north-limited-16th-supplemental-agreement.pdf. The draft Northern 25th SA track access application,
currently out for consultation, seeks, with NR support, to extend these contingent rights to December 2020.
Following the Northern precedent, it seems likely that EMR's contingent rights will be renewed on a 6-monthly basis until such time as there is a major timetable recast to alleviate the congestion through Manchester.
*Although the Chester/Ellesmere Port services do not pass through the corridor, they are regarded as "interfacing" with it, in that they potentially conflict with corridor services at Ordsall Lane and Irwell Street Junctions.