Final Verdict
Oddschecker Coral history for Espoir D' Allen (Triumph) and Mengli Khan (Supreme), Total Recall and Whisper (Gold Cup) and Buveur D'Air (Champion Hurdle) shows that the same pattern alleged by Maxbet is apparent. No change of prices was flagged for any of those horses until the following morning.
However on November 25th the price of Bristol De Mai was dropped by Coral from 25/1 to 10/1 on the same day as he won the Betfair Cup. The same goes for Apples Shakira and Gumball (Triumph), so there is some evidence to suggest Maxbet is right about the weekend just gone but maybe not about Coral in general. Nonetheless to avoid possible conflicts in future, as of today Corals is withdrawn from the list of "allowed" bookmakers for the purposes of this competition.
Whilst we make it absolutely clear that we don't believe anyone was deliberately trying it on we will restrict Maruco who bet on Presenting Percy post race on Sunday to 12/1,which he has already kindly indicated he will accept and Singing Detective has sent me a PM asking me to withdraw his bet. Likewise Digger has indicated he is happy to accept the odds of 16/1 about Whisper. I will edit their bets to reflect this.