My son left Northcote House this summer. Unfortunately, it was bought over by a large chain around a year-ish ago. It used to be a family run nursery before that. We were there during that period and like any management change, there was a lot of upheaval and staff leaving.
Unfortunately, I think all the day cares run by big chains are the same and are so inconsistent. I've got two kids and experience of four different day cares between them which we loved at one point but there was a change of management and things got worse so we left - I'm sure they got better again, but I'm not sure I know any day cares that have been consistent throughout. You should check it out yourself as things may have settled now. We were happy for most of the time there after all. Plus, I really would take Ofsted reports with a pinch of salt...
You could also try Bright Horizons - I don't have experience of it but I know they have long hours.
Honeywell Nursery is fantastic - I know lots of kids there. The head of the nursery is an absolute gem and from parents I've spoken to, the nursery has always had a great reputation.