Recommendations for restaurants with private dining rooms for Christmas meal with friends - relatively inexpensive!
I would enquire at any of The Ivy restaurants - which are surprisingly reasonable if you want a PDR! Always feel lovely and festive and the food is decent
Bancone do a great feasting menu for £45pp
They were a recent Best Italian winner in our SheerLuxe London Bar & Restaurant Awards too: https://sheerluxe.com/culture/restaurants-bars/best-italian-restaurant