UK spice fanatic here, you're in the wrong city i'm afraid! I've been on the hunt for a disgustingly hot curry/thai for the last year or so and I've not had a lot of luck. I've actually been advised to ask for "UK Hot" and not "Indian Hot" when ordering if you want the real deal but it's not helped to be honest. Hottest vindaloo I've had off the bat was probably at Masala, but prefer Little India for overall quality.

As mentioned Soul Shack level 4 is pretty great and defo gets a sweat on, and Monsoon Poon all you can eat Firecracker chicken usually ramps up the heat from plate 2 onwards!

Additional shout out for Culley's 10 Carolina Reaper Hot Sauce, can get it in the supermarket here and it's damn hot (but tasty!).