I am a lifetime Platinum member. Within 6 hours of the announcement of the wedding date for the Royal wedding in London I tried to book any of the 5 main Marriott Hotels in central London and none would even accept a reservation cash or points! Why? Is it typical to block off entire hotels for large events? No access even for Platinum members? 24 hous before the wedding day announcement not a single Marriott was listed as sold out!
Good Morning, I am sorry you have been encountering difficulty with finding a room for a potential stay. Given the magnitude of this event, your assumptions may be correct that the hotels are blocked off for royal guests, etc. Have you been able to reach out to the properties directly, perhaps via email or telephone? It may be worth checking directly with the hotel personnel one-on-one in order to find out. I hope this helps - thanks!