Although engaged in two races at Sandown I think Poker School is more likely to run over the bare minimum 2 miles as nicely handicapped off 130 (10st 5lbs currently). Betfair are offering 8/1 which is generous as ran well behind Sturnrubin at Ludlow. The pace set by Gino (11st 12lbs)will allow him to settle well and I see him being closer to 7/2 on the day.
Not the end of the world if he goes over 2.4 miles but would have lost my cash