This service is actually Cambridge to Brighton via Trumpington P&R, Stratford & Gatwick. It was extremely poorly advertised in the press releases that I have seen and doesn't reflect the true service. It therefore has a lot of new links which aren't available on the core NatEx network. Cambridge to Stratford, Cambridge to Gatwick. London Stratford to Gatwick and then of course Cambridge and Stratford down to Brighton.
It stars off as running Friday, Saturday, Sunday and Monday until 3rd July when it will start running daily. Service is to be operated by Cozys Travel from Royston/Sandy (not sure which depot is running it as Cozys are asking for Flixbus drivers at both places depots)
Screenshots below from the Flixbus website showing these trips as running to/from Cambridge
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