The Northern 153 dispensation documents have been updated to include the Abellio East Midlands Railway class 153s to allow operation on the Barton Line. Please see below:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/887136/northern-angel-class-153-2020-dispensation.pdf
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/887137/northern-pb-class-153-2020-dispensation.pdf
