Possible Clues:

• Get it when you check in
• Getting on with Number 10? Essential to display this before The Rising!
• Getting on with The Queen - it's what flighty types at The Gate ask for
• What one needs to get on
• Accommodating The Queen - sounds like something the flighty types would ask for at The Gate
• Lodging with club -- perhaps this gets you through gate
• Sounds like greeting you'd get from new friendlier Ryanair? Although you have to print it yourself!
• One who's getting on must be given this before rising
• Gin served in cardboard container available at Terminal 5 …