We live in a suburb that is known for being very diverse. We don't live in UK (in Australia). We were looking for day care centres for our dd that claimed to be diverse and where shocked at the lack of diversity. The children there were at least 90% from Chinese backgrounds. On the day we inspected one place there was only one white child and one Indian child.
How on earth is that diverse?
We ended up settling on a childcare run by my workplace. It has a great mix of different backgrounds and they celebrate a range of holidays from Christmas, Diwali, Eid, and Lunar New Year, and they bring in elders from the local Aboriginal community to teach them some of the local language. The one we choose doesn't advertise as being diverse.
It feels like around here diverse has lost all meaning and just means not white.