actually the city is pretty representative of the national picture
Sheffield White (All) - 91.2%
National White (All) - 90.9%
Sheffield Mixed - 1.60%
National Mixed - 1.30%
Sheffield Asian - 4.55%
National Asian - 4.57%
Sheffield Black - 1.78%
National Black - 2.30%
Sheffield Chinese - 0.42%
National Chinese - 0.44%
Sheffield Other - 0.40%
National Other - 0.43%
But yes compared to somewhere like London where just 59.7% are White British, it could be a bit of a culture shock, but it is still pretty diverse. And the uni itself will be even moreso with international students and a whole melting pot of students from up and down the country.