The URL link for the Amazon UK listing page for
FBI: Season One, followed by the front cover artwork for the release:
https://www.amazon.co.uk/FBI-Season-1-DVD/dp/B081QQXKZ4/ref=sr_1_2?dchild=1&keywords=FBI&qid=1594857874&s= dvd&sr=1-2
[Show spoiler]
The set had been stuck around £20 (rounded off). Recently the price dropped down to £12 (rounded off).
The second season started on Sky Witness last Thursday night, so it probably won't be until early next year when it's released on physical media DVD (and hopefully it includes the bonus FBI: Most Wanted crossover episode, even though I haven't seen any news yet about whether a UK channel is going to acquire the spin-off).