“Mr. Sood” (Kunal Nayyar) is a wealthy but curmudgeonly British-Indian (via Uganda) businessman who, on Christmas Eve, sacks most of his staff for having an impromptu party before heading to his luxury home brimming with a spirit of bah-humbug - or the vegetarian, Hindu, equivalent. Meantime, his loyal clerk “Cratchit” (Leo Suter) returns to his own large family, a past it’s sell-by-date chicken and the ailing “Tiny Tim”. Loathing the carol singers who couldn’t, admittedly, carry a tune in a bucket, and expecting his long-suffering housekeeper to turn up on the big day, “Sood” is…