Crepuscular rays and a bank of cloud

After a cloudy afternoon, a huge slab of cloud moved west out over the Irish Sea towards sunset. It was amazing to be high up and see it like a live weather map. Not sure if this constituted a front - they don't generally move east-west.

Behind it came crepuscular rays. Apparently the rays are really parallel but seem to converge due to perspective. See https://en.wikipedia.org/wiki/Sunbeam