Increased possibility of witnessing nacreous clouds from UK

[MitchT]

An increased possibility of witnessing polar stratospheric, or nacreous, clouds from the UK in the next day or two:

http://wp.lancs.ac.uk/aurorawatchuk/2017/01/25/pos...

[XM5ER]

I saw something very similar this morning but the sun was too far up for the colours to show. I will take a look before sunrise tomorrow.