Uk government and 15million pounds to France

In todays Sun paper,the UK was going to give 15million pounds to the French to help close compounds in Calais,and help the French enforce the law in France by returning illegals back to their homeland.The Uk has decided to invest in more Xray machines instead.It is only the UK that pays for flights to return failed asylum seekers.I am wondering,how many have got in to trailers that are going the opposite way from the UK,do they read the shipping notes on some pallets,with the destinations glued in to the loads.How many have been shipped from Calais to,say,for example,Paris,and want to get out,without a confrontation from the driver.Or wait untill a rest stop,and cut the trailer to get out.