I ended up getting a Stadia Premiere Edition (Controller and a Chromecast Ultra) for £20 down from £70 and tried it for essentially free (Stadia Pro 12 months free).
The got £20 refunded when they wound down - announced 3/4 of the way through my Stadia trial.
So all free and got a long cabled USB-C charger, a newer Chromecast than my old one, which ended up on the 2nd TV, and a controller I can repurpose.