Have you looked at Mayfield Nursery? It's a family-run nursery, tucked away in the Springfield Hospital site, just off Burntwood Lane so it sounds like the location may suit you. I have two children there at the moment and do not have a bad word to say about it. The staff are all really lovely and rarely leave (which I take as a very good sign). There are three rooms, all of which are really large and there is a huge garden which is what appealed to me when I chose it. They also have separate sleep rooms which I think is a great idea as it means that the little ones who need to sleep aren't disrupted by those who don't. You can do the virtual tour of inside nursery on Google which I found really useful as it's hard to take it all in when you visit. I did lots of research before choosing a nursery and asked current mums which was really helpful.
Best of luck!