Basically pressing at the Park Tower London.

But I also got "free pressing" at the Sheraton Towers Hong Kong, and I didn't care that a butler didn't pick up and deliver.

I also had a butler once bring a vase for flowers which I purchased and brought to the room.

Also, I had a severely sprained ankle in Beijing while staying at the STR and the butler brought me ice and called the hotel manager who offered me a free bottle of red Bordeaux and a cheese plate. That sure helped with the pain.

I don't think any of these things are really butler services versus services that would generally be provided by other hotel staff.

I haven't used unpacking or packing, but that's one thing that I think falls exclusively within the butler realm.