Dozens of migrants hoping to make their way to Kent managed to unlock a secure door into the Eurotunnel site in Calais.

According to the The Telegraph around 30 people found their way into the secure zone at the Coquelles Channel Tunnel site by guessing the security code for a gate.

According to the newspaper, the migrants looked to see which numbers were the most worn or the dirtiest on the keypad before walking in on Thursday.

The men were intercepted by security personnel and the gate has since been padlocked.

The news comes a day after .a suspected illegal immigrant was been charged with allegedly walking through nearly the entire length of the Channel Tunnel

The 40-year-old Sudanese national was arrested a short distance from the British entrance to the 31-mile tunnel on Tuesday.

Yesterday, the Home Office said the first phase of a £7million improvement to fencing on the French side had been finished.

A spokesman said: “We continue to work closely with the French government and Eurotunnel to tackle the immediate pressures and longer term issues involved in the situation in northern France.

"The UK government has recently invested £7million for fencing at Coquelles to secure the Eurotunnel platforms, as well as further perimeter fencing.

"The first phase of fencing at Coquelles was completed today.

"Extra Border Force search and dog teams have also been drafted in to further protect the Eurotunnel site.

"Since last year, the UK Government has provided funding to bolster the security and infrastructure of ports in northern France including a £2 million upgrade of detection technology, a £1 million extension of dog searching capacity and an additional £12 million to reinforce security at the juxtaposed border."