In the CrossCountry reservation thread, Birmingham – Tamworth's been brought up as a flow where mandatory reservations would be particularly cumbersome. Would it be worth introducing extra Birmingham – Tamworth services, either only between those two stations or as an extension of an existing service (e.g. Hereford or Shrewsbury – not as I think there's lots of demand between the pair, but just to get trains out of the way from New Street)? That would leave more space on Nottingham and Edinburgh services for longer-distance passengers. Tamworth – Birmingham is 170,000 passengers per year against 47,000 for Burton, Derby and Nottingham (and 100,000 for Euston). The problems I can think of are capacity at New Street, especially for terminating services, reliability of a service anywhere through Birmingham, pathing between existing XC services and reversing at Tamworth.
