These aren’t group 1 animals with a plan mapped out for the season they are exposed handicappers and generally as long as they are fit they’ll run. These races at the lower level fill up pretty quick so you have to run while the chance is there.
A glance at the trainers I would imagine geography would play it’s part. The only other 5f handicap race for class 6 horses today is a 0-55 at Brighton. If you’re racing for £1,600 there is little point in bringing a run of the mill handicapper all that way if you are based in Yorkshire.
Besides looking at one of the entries, King Of Swords, I remember him winning at a big price from the old stall one at Beverley before now so I expect his owners have little fear in which draw he gets for instance.