The Prime Minister's spokesman discounted suggestions that the holiday is partly a working trip. "The visit is entirely private," the spokesman said. "He has no public engagements." But the significance of a visit to Egypt with its record of terrorist attacks on tourists will not be lost on the security services. In 1997 nine German tourists were shot dead on the temple steps at Luxor by Islamic terrorists. Downing Street also confirmed today that all four children, Euan, Nicky, Kathryn and baby Leo, are on the trip.