President spoke to young people at London town hall on Saturday
HRC describes warning as ‘embarrassing’
Activists angered by delay
Researchers estimate 10,000 cases already avoided
Rates ‘significantly higher’ than general population
British Embassy staff to march, promote LGBT rights
Scotland-based LGBT group issues report
Cost cited as main reason for delay
Some argue monogamous gay couples should be exempt
Vaccination protects from various forms of cancer
