Experts say blocking right to apply for asylum is an infringement of Universal Declaration of Human Rights. Border officials are now being trained to force boats away from British waters as surging numbers of migrants attempt to cross channel.
The number of migrants and refugees crossing the channel in small dinghies has risen this year after the British and French governments clamped down on other forms of illegal entry such as hiding in the back of trucks crossing from ports in France.
France and the UK agreed in July to deploy more police and invest in detection technology to stop channel crossings. French police have confiscated more dinghies but they say they cannot completely prevent departures.