Kettering Northants QC-- I think you're right. If that little lift went to the top, it would have to be running up the outside of the building, and we know from all the floorplans that that isn't the way the building is designed. The only other place I could see a mystery lift running to the top would be as part of the bank of service elevators. Maybe there's a secret entrance to those--or a tricked out fancy one just for this purpose-- from the little hallway down to the Jim Thompson store. It'd be perfectly plausible that one exists. I could see, say, a certain fugitive ex-PM wanting to use a private lift. In my case, when I went on a tour of the suites and when Me. Megatop and I later stayed in one of them (and had a party in one), when had to use the main lifts like all the other proles.

I think the purpose of the lift next to the Boutique is to connect the main lobby area with the area of the ground floor running from Mei Jiang to RC&T. But for that little lift, if you were handicapped or toting tons of luggage one way or the other, you'd have to go down the main elevators to the Spa side, then outdoors to garden area, then back in.