So you don't think a van load of terrorists pulling up on Ashton New Road and armed with automatic rifles and explosive devices who then opened fire on the hordes of people stood outside, in City Square or in a queue, wouldn't be as bad as someone detonating a device inside the stadium? You're insane if you thing a device inside would cause more carnage than a risk-free attack outside.
And there's another thing. When I flew out to the USA recently, the security devices at the airport detected a paper tissue in my trouser pocket. The hand-held wands at City don't even detect my car and house keys. In fact yesterday, I took my keys out of my pocket and held them in my hand as they put the wand over me. The steward didn't even ask me what I had in my hand, if he even noticed. I could have easily had a grendae under my hat or a pistol taped to my ankle. Neither would have been detected.