Yesterday a group of us went on the Harry Potter Studio Tour near Leavesdon. For normal Harry Potter fans there are lots of things to go for, for foodies there are two - Butterbeer & the sweets in the giftshop.
About 2/3rds of the way round there is an outside bit which is the 'back-lot' of the film studio and contains things that you wouldn't expect to see inside and are fairly rain proof. There is also a refreshments stand that sells Butterbeer! If you haven't heard of this then the tour porbably isn't for you - you need to appreciate a bit of the story to get the most out of it. The main characters look forwards to Butterbeer from Hogsmeade when they go on their school trip there. It's never said to be alcoholic in the books, and it certainly isn't here. We bought one to share amongst 4 (it was only £2.95 but I'd seen a few half drunk ones floating around and didn't want to risk it).
Here is me on the actual Knight bus with my Butterbeer! You can't tell this is a giant purple triple-decker bus from this pic, but it is.
And here is the best cropped close-up of the drink I have - it's essentially a 'float'. This is a fizzy drink with vanilla ice-cream on the top. I'm not really sure what the base drink is, it's almost like non-gingery ginger beer, or a less sweet lucozade. It is VERY sweet, and after all 4 people had a small taste I was the only one willing to finish it. In the interests of Science and like Spectre many times before me I finished the beer-like-beverage. I enjoyed it, but I certainly couldn't drink this by the pint! As a welcome drink while wandering around it was perfect, like the Aztec chocolate drink you got when Cadbury's World first opened round the corner from us.
Oh but what of the fabled giftshop! Much has been written about the small section by the door with £150 Snape coats & Dumbledore's Robes for £500 but frankly the rest of the shop is just like a normal London tourist attraction. T-shirts were around £25 but of a very nice quality, and I got a £22 Silk Tie (Slytherin, naturally). One of our 7 Wizards picked up a £7.99 chocolate frog from the shop which is a huge 150g monstrosity and is as close to film authentic as you can realistically expect to get.
It even has a 3D wizard at the bottom of the box - it's Slytherin again! That japester gets everywhere!
I can easily recommend a trip to Harry Potter World for anyone that loved all the books (or films), I avoided all spoilers beforehand and haven't put any here, but suffice to say there is a LOT to look at and as time progresses they are only going to expand this. It's like a little American tourist experience in the Hertfordshire countryside and is half a day well spent.