Bose QuietComfort Ultra Bluetooth Headphones (2nd Gen)

Was about to order these from Costco but the £70 voucher can only be used on apple or Google play store or Uber eats so decided to go with Amazon.
To my surprise they whacked a £39.78 discount on at the checkout Theres absolutely nothing on the main page to suggest a discount so Im extremely interested to hear if this works for anybody else.
Ive added another one to my basket to see if it works again and it does. I dont have any Amazon credits (I had to check as couldnt figure out why the discount was there).
Amazon product information
BREAKTHROUGH SPATIALISED AUDIO: Super immersive sound spatialises everything, taking the music out of your head and placing it in front of you to push the boundaries of listening.
NOISE CANCELLING HEADPHONES: Enjoy Boses best noise cancellation for headphones with Quiet Mode, turn on Aware Mode to hear more of your surroundings, or combine noise cancellation and Bose Immersive Audio with Immersion Mode.
NEW CINEMA MODE: Bring video content to life like never before with Cinema Mode spatialise and balance background sound and sound effects for movie-like immersion wherever you go.
USB VOICE: Use the built-in mic to enjoy high-quality two-way communication for phone calls and video conferencing while connected via USB-C.
ENHANCED LONG-LASTING BATTERY: Up to 30 hours of play time (23 with Immersive Audio) keeps the music playing through even the longest listening sessions. Charge your headphones with the included USB-C cord and listen to music at the same time.
BUILT-IN MICROPHONES: Noise-rejecting mics focus on your voice and AI-based background noise suppression filter out your surroundings and wind for clear phone calls.
STYLISH PREMIUM DESIGN: Comfortable headphones with plush cushions wrap your ears in a soft embrace while the refined metal headband evenly distributes pressure, ensuring a snug fit all day long.