Is there a chart somewhere on the website that lists when dates open up for reservation? I'd like to plan something for next summer (wimbledon) but the dates aren't open yet on marriott...
I do not know of a chart however; the rooms open up for reservations at 350 days prior give or take a day if my memory serves me correctly.....that hardly ever happens!
Just go to Marriott.com, Find and Reserve and type in London and your dates and the pricing grid will allow you to reserve thru July 4 today (July 5 tomorrow and so on and so on). Good luck