According to George Dobell in The Cricketer, Dan Mousley and OH-D both needed scans on hand injuries but will be fit for Friday's game. Chris Woakes has an ankle injury and won't be fit until the Yorkshire game (earliest), which is when Latham may also arrive.
Hamza Shaikh will bat at three and Kai Smith will keep wicket and bat at seven.
Fernando will be available to join the bowling attack and Ethan Bamber will also make his Bears debut.
Jacob Bethell is tied up with the IPL so is not available.
Chris Rushworth has a calf problem and is unlikely to be fit for a while.
The only question seems to be whether Danny Briggs will play as a spinner or, if not, who will be added to the pace attack - maybe Michael Booth.
So it looks like:
Davies and Yates to open (sorry, Highveld), Shaikh, Hain, Mousley, Barnard, K. Smith, Briggs or Booth, Fernando, Bamber and OH-D.