Don't know how good these deals are, but I've personally been looking for an entry-level pair of noise-cancelling headphones, and I noticed a banner for last-minute Christmas deals on Amazon UK. Clicked it and saw "up to 30% off Sony headphones."
The blue design on the Sony WH-CH700N caught my eye and they're going for 25% off on Amazon UK (around €82). A quick comparison with Power City and Currys shows savings of around €17, which is decent enough if you have Prime membership I suppose.
Here's the full list of discounted Sony headphones if anyone's curious.