On the left as you walk in from the London Road end, about halfway. They don't open until later in the day (midday) at the moment.
Yes Sunny foods is brilliant always use it, really good for vegan stuff as well.
I feel so lucky, I have always had the Open Market, Five Ways and Sunny foods on my doorstep. Plus we now have Waste Not, Store and HISBE who all do refills of most household things and you can buy what you need quantity wise. The only thing I struggle to get outside a supermarket are Corn Tacos.