That's true scubadiver, you are more likely to see them 'down south' although I wouldn't say they were common, not yet anyway.
Whether it's to do with climate change or they just can't be bothered to migrate, I don't know, but there are certainly more and more 'exotic' species preferring to stay in the the UK and even breed.
Thank you for sharing with us St Germain.Any birdy sighting or news is always well received and very exciting.
For a PS, if you want to see a winter spectacular come down to Dorset, Brownsea Island in particular. This is where the 12,000+ Avocets plus Godwits etc. over winter. The RSPB do special boat cruises around Poole Harbour - for those fortunate enough to have sea legs!