Like Crossrail, Thameslink could benefit from a haircut. It would be advantageous if the route was cut back and possibly transferred to London Overground. North of London, it should not run much north of, say, St Alban's or Welwyn Garden City. Suitable destinations south of London would be Wimbledon, Bromley South, Caterham and Tattenham Corner.
Procurement of new trains for Thameslink has been problematic due to the number of conflicting requirements that must be satisfied for a route that is a long-distance service that also carries crush-loaded traffic through the centre of London. Instead of procuring a fleet of trains to an entirely new design, a further build of the Bombardier class 378 would do very nicely for such a cut-back service. If the cash is really running out, a refreshment of the class 313 fleet would suffice.