The iPhone has officially launched in the UK, and iLounge editor Bob Levens was on hand for the event. According to Bob’s report, the line grew substantially between 5:00 p.m. and 6:02 p.m., from 5 to “approximately 30 people” with about 12 or so queuing outside a nearby Carphone Warehouse store. Interestingly, “some tension was displayed between the staff of the two stores as the CPW staff tried to entice people from the O2…