Don’t expect any official clarification from the big bookmakers about this unless it comes to the crunch. They won’t want punters knowing they’re effectively getting a NRMB freeroll about the Irish horses.
Dave Nevison (in the only sensible thing he has said in a long while, perhaps ever) recently made the point that you could freeroll Chacun Pour Soi at 6/4 now, knowing it’s money back unless he drops dead or publicly gets a major injury in the next month or two.
But when it comes down to it, you have to think it’s 99% sure bets on Irish horses will be voided as a goodwill gesture by all the main Oddschecker bookies if the Irish are unable to run due to travel restrictions. And AP bets on UK horses who make it to the race will stand without any deductions.