I travelled from Taunton to Reading on Friday early in the evening, and my train, which had originated at Newquay, was announced repeatedly at Taunton as the "Atlantic Coast Express". While that's a geographically appropriate name for a service from Newquay, I was amused that the modern GWR has overcome its nominal predecessor's hatred of all things Southern and has re-used the name of its old rival's flagship express service.
It wasn't actually very "express", making about half a dozen calls between Taunton and Reading, which many trains cover non-stop. Though the original ACE wasn't very fast either, having to collect through coaches from various branches at junctions en route.