London Christmas day meals

[originalmavis]

For reasons I don't want to be reminded of, we have had to decamp for God alone know how long, so our planned big family christmas lunch cannot happen. We can't go home, long story.

So, I'd love to find somewhere either Central London or drive able for a nice. Christmas day dinner.

Only proviso is sonewhere that can do 'healthy' option (genuine health reasons, not fusspot).

Not the end of the world, could be worse, making best if a bad deal, etc, but a pain in the backside nonetheless!