Being married to a Brit and spending a fair amount of time there myself, I pride myself on speaking both English and American.
I can add several to that dictionary ....
Holes: we call it an outlet, they call it holes (or "oles" if they're from the East End).
Chemist: the Pharmacy
Wellies: boots, specifically Wellingtons
Knackered: tired
Bum: we call it a butt, rear end, or the "A" word
Git: Dumb person
Garden: any piece of land they own is the garden, never a "yard".
Ta: Thanks!
Mate: Friend
Afters: dessert
Pudding: also dessert - it could be a Pudding (NOT to be confused with the Jello brand type pudding!), or it could be pie
Pie: usually meat, if it's fruit pie they'll specify
Chips: French fries
Crisps: Potato chips
Sweets: candy
Oh ... a "fanny" is NOT a butt - rather it is referring to the lady parts. Brit's don't have "Fanny Packs"... they have "bum packs".
tons more. I've been married to the man almost a decade, and every now and then I'll still hear a new one.