Hi!
I'm at the Uni of Nottingham in my 3rd year so I can give my opinion on these!
Accommodation: The accommodation was really easy to make friends with since I was catered for, you ate dinner together each night and it was such a weight off your back not to have to cook in first year! Though of course there was self-catered accommodation too which was huge so so many options of people to meet. It was very decent in terms of rooms and size, mine was bigger than my room at home! I enjoyed my stay there a lot and made the friends I have now from my accommodation.
Nightlife: very student-y!! Every club and pub you go to in Nottingham will be full of students which gives it a very friendly vibe. It's so busy and the clubs are brilliant, cheap enough and so much fun. However, the city is also the best for restaurants and activities like mini golf so nice when you're not drinking too.
Diversity: the university is full of students from different countries, cultures and religions. Coming from quite an isolated city, I was able to meet so many different people and learn so much about their backgrounds and traditions. Just under a third of the students at Nottingham are international students so diversity is high.
Workload: it completely depends on how much work you want to do and what grade you want to achieve. Speaking from a Natural Sciences perspective as that's what course I do, I'd say the workload has always been manageable. It varies throughout the year with deadlines and exams but it is always do-able. I have never fallen really behind or been worried I didn't have enough time to do something, unless it was 100% my fault
I hope this helped! Let me know if you have any other questions
Laila