This move is long overdue and is to be welcomed. Very few independent hotels have the ability to link to these sites in real time which has the consequence that they inevitably show inaccurate availability and pricing information. That means they cannot possibly comply with consumer law so long as they continue to sell based on false availability and price indications.
Their contracts with suppliers are also excessively manipulative and exploit their market dominance.
They will no doubt say they are doing their best to comply with the law in a fast moving world and the law will have to adjust to accommodate them. However, the truth is that it is their model which is flawed and not the law. At the end of the day, they will have to stop selling using bogus claims of limited availability and exaggerated discounts and also permit unrestricted free competition on rate setting.
The CMA needs to be strong on this and ensure a level playing field where existing law applies equally to everyone.