England is off to a good start, and they are currently 107/2. This is perhaps the best start they have got so far in the current Ashes series. Joe Root is still there and Ben Stokes is yet to bat. So if everything goes well, then they may be able to score in excess of 300 (most probably in excess of 400). And that would give a lot of confidence to their deflated bowlers, especially Jofra Archer and Stuart Broad. The English bowlers just need to pick one wicket (that of Steve Smith). And IMO, it is possible as I am still of the opinion that Smith is a human rather than an alien. Just pick that one wicket cheaply and the Brits will be able to get Australia out for less than 200.
Smith is not an unbeatable batsmen but England bowlers are incapable of taking his wicket early and he's no Gayle or Sehwag or even Stokes who get out for 0 or 10. He knows how to play against Eng's bowlers. That's why he's dangerous while Eng only manages if they have wickets in hand while many of their batsmen fail to perform.
Current partnership is 39 so they again need a 150+ partnership to even reach 350.