England's strength in depth...and who makes their RWC squad?

First topic message reminder :

Mirroring the thread I did for Wales, England have had huge strength in depth for the last 9 years or so. Under Lancaster it seemed to be a hindrance as much as a strength, with no-one really leaping out to claim key positions, cycling through the likes of Twelvetrees, Burrell, Barritt etc. in the centre.

Now, it feels like England do have some real test quality players who have grabbed shirts with both hands and are nailed on: the Vunipolas, Tuilagi, Lawes, and latterly players like May, Curry, and Underhill.

With that in mind...who makes England's 31 man squad based on who's fit and available (as well as who's out injured)? If you want to include who you'd personally pick as well that'd be interesting, but who do England fans think will be in that squad in Japan?

Also, who is in the starting 23 and who are the 6-7 reserve players who stand a good chance of a call up?

I've done it for Wales in the Wales thread - think it's looking very settled, with a few first 15 positions up for debate depending on opposition. From the outside England's squad looks a lot less settled or certain.

Squads ten to be:

17-18 forwards
5 Props
2 or 3 Hookers
5 Second rows
5 or 6 Back rowers

13-14 Backs
3 Scrum-halves
2-3 Fly-halves
3 Centres
5 Back 3

So who/what is the current England squad?

Can we add the warm up fixtures and current squad to the OP, or given that the OP has flounced off and we're nearly at the end of the thread, should we create a new one?