9L95 1721 Luton-East Grinstead

On today's journey, we take Thameslink 700105 on 9L95, the 17:21 Thameslink service from Luton to East Grinstead (as far as St Pancras International), set in 2020.
Along the way, we will be calling at Luton Airport Parkway, St Albans City and St Pancras International
Another driver will take over to call at Farringdon, City Thameslink, London Blackfriars, London Bridge, East Croydon, South Croydon, Sanderstead, Riddlesdown, Upper Warlingham, Woldingham, Oxted, Hurst Green, Lingfield, Dormans and East Grinstead

[@mariusgosea5912]

Why is there less East Grinsted services on Thameslink than Southern?

[@AndrewTiffin]

That's because they only run in the peak hours