I feel like this restaurant goes against what Jamie Oliver believes in: fresh, homemade, real food. I was pretty surprised to discover their breads and desserts aren't made in house, and also disappointed that it meant the only option for someone with nut allergies like me was sorbet.
The food was hit or miss - my coworkers didn't have great things to say about the squash bruschetta or the tomato salad, but they liked the polenta cake (although not made in house) and we all really enjoyed the porcini fettuccine! And if I want to be nit picky, I'll mention that the Pimm's Cup, although good, was not authentic at all.
My overall impression was that it just feels like any other chain restaurant and nothing really wowed me enough to make me eager to go back.