Megiddo on 16 July 2018
Nah, they were actual deals. They were lightning deals so they expired.
They were each around 339 pound sterling, about ~40 pound savings.
EDIT: http://www.nintendolife.com/news/2018/07/deals_grab_a_bargain_on_nintendo_switch_goodies_on_amazon_prime_day_in_the_uk has the details.
"We've added the direct links below so make sure to grab yourself a bargain. As you can see, the deals have now dropped to £329.99 and £339.99 respectively, saving around 13% on the asking price. "
