FlyerTalk Evangelist and Ambassador: The British Airways Club
Join Date: Jun 2008
Location: Somewhere between 0 and 13,000 metres high
Programs: AF/KL Life Plat, BA GGL+GfL, ALL Diam, Hilton Diam, Marriott Gold, blablablah, etc
Posts: 33,205
Not stayed yet, but hotel ended up responding to my query and confirming that they fully participate in ALL and honour Diamond benefits . Of course, devil will be in the detail (especially on the "subject to availability" benefits like upgrade and late checkout), but having an answer is already a good start!