[DO NOT MERGE]Marriage abroad ticket6

ticket: https://www.pivotaltracker.com/story/show/74592704
doc with changes: https://docs.google.com/a/digital.cabinet-office.gov.uk/document/d/19lH4WxwqnZ0hHHR9tcBa4vT5SJeLjT-I5k2YVRQ1DTs/edit#