By Justin Landsberger Everything goes wrong immediately when a guest commits the ultimate indiscretion and turns up an hour early. Dinner parties are tough. Nothing ever goes as planned. The whole idea is to catch up with your nearest and dearest but you can do that with much less hassle, and with far more enjoyment, in the comforting surroundings of your favourite London restaurant. The food is better, the wine list more interesting (albeit more expensive), and you don’t have to do the dishes afterwards. Still riding a wave of post-pandemic popularity, more of us are being pressured into host…