I've added a few more services including Sainsbury's local, Booths and Fresh & Wild. I'm aware there are some issues with a small number of missing services or incorrect opening hours. I have some reports to highlight these issues and will try and take it up directly with the stores as often it is also incorrect on their website too.
Traffic has grown considerably over the past month, it will be interesting to see how quickly Google picks up these latest changes.
I'm working towards an XML schema so that I can more easily import and update the services. More details will follow on this, but let me know if you might be interested in producing XML for Opening Times.