Daft question but which Bangor? I've been to Bangor in Gwynedd several times but not enough to recognise that piece of road or to be certain about the hills in the background.
However it does look a lot like Gogarth next to Llandudno in the background to my untrained eye, in which case a southerly wind like we've had lately would roll off the tops in Snowdonia & could cause a mountain wave & thus lenticular like that.
