In terms of selection, we may not come out of this game too badly. I can't see Biggar in a position to start in 5 days time, he looked in considerable pain, and that could be the best thing for us really. England won't relish going up against Sam Davies as they won't know how Wales will play with him at 10. I'm confident he'll both manage the game better (his kicking from hand is superb), and he'll vary our attack. We didn't get to see it v Italy because the game was so broken-up when he was on, but probably his biggest strength is phase play, picking out the correct runner with pinpoint passing. It's the reason his try assist stats are through the roof at the O's.
If Biggar isn't fit for the bench either, Williams will bench, this rendering the inclusion of Roberts pointless. Hopefully that would prompt the inclusion of Steff Evans or similar.
Team I'd like to see:
Rob Evans, Ken Owens, Tom Francis
Jake Ball, AWJ(c)
Sam Warburton, Ross Moriarty, Justin Tipuric
Rhys Webb, Sam Davies
Scott Williams, Jon Davies
North, Liam Williams, Halfpenny
Baldwin, Smith, Lee, Thornton, Faletau, Davies, Williams, Evans