LGBT pressure group Stonewall is demanding that passports be changed to include a 'gender X option', so that people who do not identify as their birth sex do not feel uncomfortable at airport security. It comes after last week, HSBC changed its forms to include various 'gender' options, such as Ind, short for 'individual', Mre, which is short for 'mystery' and Pr which means 'person'.The government said it is reviewing gender options on official documents, including passports.