Nice Powerpop / Indie by this 4 / 5 Piece band from the Bangor area [1980-1985]
John Dexter-Jones (Voc, Guitar, Cowbell)
Huw Heywood (Guitar)
Carl Owen (Bass)
Eilian "Ale" Jones (Drums)
Dave Owen (Sound Man)
If I was to hazard a guess I'd say the name White Summer Came from a love of Led Zeppelin.