Lawmakers say they will question Britain's immigration minister over worries about lengthy queues for passengers arriving at London airports — just months before athletes flock to the capital for the summer Olympics.

Keith Vaz, chairman of Parliament's Home Affairs Select Committee, said Friday that Damian Green would appear before his panel next month amid concern over growing delays at immigration desks.

Passengers have complained about recent lengthy lines, some of more than an hour, to reach passport control at both London's Heathrow and Gatwick airports.

The British Air Transport Association, which represents airlines, has written to the government over its concerns that Britain's border agency has too few staff to cope.