For those not familiar with the immediate area: the Trumpington park and ride site is just off junction 11 of the M11. It's linked to Cambridge South station by 1.3 miles of guided busway, with a bus every 10 minutes at peak times. Parking is free, and the "short hop" return fare on the bus is £3.80, in other words cheaper than any local station car park. So it will be interesting to see if drive - park - bus - commute from Cambridge South (to London,for example) becomes an established pattern once people appreciate this possibility.
Has it been confirmed where the Busway stop for the station will be? It's surely too tight a corner for buses to turn right into the new station after crossing the busway bridge?
Ideally they would stop on the Hobsons Park side of the bridge so people can access the station from that side.