Wales Air Ambulance has confirmed their Swansea-based helicopter attended the M4 crash scene this morning, where they flew the bus driver to hospital.
A spokesperson said: "The crew was mobilised at 09:37 and landed on scene at 10:00 after the road had been closed.
"The WAA paramedics assisted emergency services on scene before airlifting an adult male to Morriston Hospital, Swansea.
"The aircraft left at 10:40 and arrived at hospital 11:00."
More top news
Well a fabulous day today has ended on a spectacularly soggy note for some! Heavy rain, hail and thunder will work northwards overnight!
The Talyllyn runs from Tywyn, near Aberdovey, for more than seven miles to two villages in the south Gwynedd countryside.
Homes in parts of Tonypandy and Llwynypia are without water this evening due to a burst water main at Cilfynydd.