** Rightmove RMV.L slide nearly 9%, hitting a 6-year low ** Traders point to a BBC report saying estate agents accuse the property portal of charging "unsustainable" fees
** BBC reports Rightmove faces a proposed class action; letter of claim seeks just under 1.5 bln pounds in damages ** Rightmove says aware of reports an application to start collective proceedings has been filed with the Competition Appeal Tribunal ** Company says it is "confident in the value we provide to our partners and consumers, who are at the core of our business"
(Reporting by Danilo Masoni, editing by Alun John)
((Danilo.Masoni@TR.com; Reuters Messaging: danilo.masoni.thomsonreuters.com@reuters.net))