In answer to your question, although it may look to an outsider that England was indeed up in flames but its actually, geographically, not covering that large an area. Every City that was afflicted most only had pockets of trouble. Though i do agree in Manchester especially, the Town Centres were worst affected. In London the 'main' tourist areas were pretty much unaffected. Believe me places like Peckham are not necessarily on the tourist radar.