President Asif Ali Zardari's ailing father and elder politician, Hakim Ali Zardari, who was under treatment at a local private hospital, flew off to London today for further specialized treatment. Begum Zareen Hakim Ali said that his condition was better than before and the doctors after thorough check up allowed him to travel. Hakim Ali Zardari, while leaving the hospital for airport, was accompanied by his wife Begum Zareen Hakim Zardari, his daughter Dr. Azra and Energy Advisor, Asim Hussain. Security arrangements in and around the airport were further tightened, as heavy contingents of police and Rangers were posted on this occasion.