Obviously you'll have to time it right, but if you're up for it, this place makes for a great destination wedding! They even have a chapel here that's been blessed by the local parish. Given the changing nature of the hotel, however, don't expect it to look exactly the same from year to year.
Interestingly enough they have a DNA research department here that is frequently contacted by the police for help with solving crimes. In a very famous case, Kew was able to discern what food a torso found in the Thames had consumed.