Ex-UK PM David Cameron recalled PM Narendra Modi's event at London's Wembley Stadium in 2015. He said it is "something you don't forget". "If you are...lucky as a PM, you might speak to 3,000-4,000 people [at best]...But to go to Wembley Stadium and introduce PM Modi, where he was speaking to 85,000 people, was quite an occasion," he added.