May-Macron summit: Border controls on the agenda
British-French arrangements on border security are under the spotlight ahead of Theresa May's meeting with President Emmanuel Macron.
What has been announced so far?
That the UK will boost its contribution towards security at UK border controls in France by £44.5 million.
How can there be UK border controls in France?
In 2003 the two countries signed a bilateral accord known as Le Touquet agreement allowing British immigration officers to carry out checks in France, while their French counterparts do the same on UK soil. The arrangements are referred to as "juxtaposed" controls.
Where are the checkpoints?
Border Force operates at a number of locations including at Calais and Dunkirk ports, the Eurotunnel terminal at Coquelles and Paris Gare du Nord and Brussels Midi stations.
What will this new cash be spent on?
It will go towards security fencing, CCTV and "detection technology" in Calais and other ports along the Channel.
Why is it needed?
British officials say the new funding will build on previous measures which have helped reduce the number of illegal attempts to enter the UK. Figures show there were more than 80,000 attempts in 2015 - falling to just over 30,000 last year.
How much has Britain already provided?
UK funding towards security measures is thought to have topped £100 million in the last three years. The latest cash injection would bring the total to around the £150 million mark.