The station sure looks pretty swish.
I believe the main building is the new standard modular (prefabricated) design, as used at Mitcham Eastfields and [that place in Essex that was rebuilt that I can't remember now]. I think they have a reasonably large selection of claddings for a standard framework, so they can ring the changes a bit.
Unfortunately the plan to put one in at Effingham Junction fell at the first hurdle, local planners thought it too modern for the site, which is a bit sensitive
IIRC▸ .
Paul