It is odd isn’t it. I mean, yes there is a certain level of anonymity in a big city ... but this is a suburb in Hull, it’s not central London where you could be completely anonymous. And on occasion (if guilty) he’s wanging it around on roads virtually parallel to his! He could have bumped into any of his alleged victims at the shops, gym, putting the bins out ... As has been suggested, perhaps it was part of the thrill. Or maybe his time outside the family home was limited, so he didn’t have time to travel much further afield without raising suspicions with his wife.