I think that the real issue is more the length of the meal, which is obviously going to be protracted at a place like Ramsay, and can test childrens' patience. Also, if they are jet-lagged, it can really drag. Even I struggle after around 10pm shortly after a long haul flight.

But, if the children simply want the GR brand, then there are plenty of options at all sorts of different levels of grandeur.