For everyone who is struggling to still watch this, follow these steps -
1. Go to this
link.
2. Click on the "Watch with Prime. Start your free trial" button.
3. This will bring you to a new page with a login/signin box. If you have an Amazon account, just put your email id and password there.
4. If you don't, click on "Create your Amazon account".
5. Now this part is easy. Just enter your info, like email id, new password, etc.
6. Once you're done, it'll ask you to add your credit card details to start the free trial. You have 1 month to cancel the free trial so don't worry about it.
7. That's it! Now you can watch the show.
NOTE: Remember this is for an Amazon UK account because it's available only in UK as of now. If you have an account in different region, create a new account for UK with a
different email id.