On the TalkTalk TV YouView box you'll find Amazon Prime Video in the Players & Apps group.
Just select the Menu button (or youview button if you have an older remote) and select Players and Apps select down and there it is. No need to go right and past all the players, just down, down, down and select Amazon Prime Video.
You're entirely welcome. The tiles may not move but easy enough to navigate...now you know how.
Just enjoying a bit of multitasking replying to you and watching 'Broken Pieces'.
Seems an appropriate title for this episode of Star Trek : Picard on Amazon Prime.