Jamie Oliver can do no wrong in my eyes. I admire his tireless campaigning to encourage kids to eat healthily and his recipes never fail me. And I particularly liked my brunch at Fifteen London a couple of years ago, another of his concepts that I love. But despite being a fan of the cheeky chappy that started his cheffing career at River Cafe, I have never dined at one of his Jamie’s Italian restaurants. However, as soon as I heard about Union Jacks, I was there like a flash. And that brings me to a point actually. I can’t remember how I found out about it – but I haven’t read anything about it since. Either they have been keeping the promotion very hush hush or I’m not reading the right publications anymore. Situated in the newly developed St Giles Piazza, Union Jacks celebrate all things British, although at first glance you wouldn’t think it. The menu specifies ‘Flats’, which basically come in the form of a pizza – with a difference. British ingredients …