Swing by Paul A. Young (http://www.paulayoung.co.uk/) for interesting and delectable flavors of chocolate including rose, balsamic vinegar and goat cheese.
Pop into the Elk In the Woods (http://www.the-elk-in-the-woods.co.uk/) for a refreshing watermelon martini and do some shopping at the so very British Suzy Harper (http://www.susyharper.co.uk/), the preppy Abercrombie-esq Jack Wills or any of the charming antique shops/vendors that line the alley.
Then move on up Upper Street for dinner at Isarn Thai (http://www.isarn.co.uk/) or Ottolenghi (http://www.ottolenghi.co.uk/locations/islington/). Isarn is owned by the sister of Alan Yau of Hakkasan fame. Not to be missed are the thom kha, crispy duck salad and roasted pork. Ottolenghi only has cold food for lunch but at dinner the asparagus and pine nut or fig and mozzarella salads should be sampled if either is on the menu, along with any lamb dish, another decadent pork belly and some excellent grilled shell on shrimp.
If you have some extra time walk a few more blocks and check out the excellent vintage finds at Palette on Canonbury lane (http://www.palette-london.com/) where you might run into Emma Watson and grab coffee and tiramisu at the always friendly Cantina Italia. If you’re still able to keep going have a nightcap at 25 Canonbury Lane before heading home.