Watch: Channel deaths: More migrants risk dangerous journey to UK - as minister claims 'progress' in stopping crossings
Finding a route across the channel is as easy as typing "smuggler" into Facebook.
Far from being a hidden world, Sky News has found that a network of smugglers is operating openly on the social media platform.
Routes into Europe and the UK are regularly highlighted, with posts featuring images of the Union Jack and Big Ben.
One smuggler even claimed he would be able to make customers a British passport.
It comes as 27 people died while attempting to cross the Channel, one of the worst death tolls in recent years.
Many who attempt the crossing come from counties including Iran, Syria and Iraq, with high numbers of Iraqi Kurds attempting to make the dangerous journey.
Sky News searched Facebook for terms written in Kurdish and Arabic such as "smuggler" and "UK visa", as well as locations such as Calais, Dunkirk and England.
These results brought up smugglers advertising the routes, listing their phone numbers and inviting people to message them privately for more information, such as costs.
There is no suggestion Facebook is taking any revenue for the content.
This post claims customers will be able to legally travel into the UK within three days and that the journey will be done in the "best, safest and easiest way".
One of the most prolific smugglers posting onto Facebook is a man who says he lives in the Kurdish region of Iraq.
He claims to be able to get migrants into a number of countries, including the UK. In this advert he promotes a route from Dunkirk to the United Kingdom at "a reasonable price".
On his Facebook profile, he describes himself as putting "trust before profit". His cover photo - a photo at the top of the page - is of a passport and boarding card.
He often posts several adverts a week, many with the same wording. In his adverts he claims to offer guarantees as well as being able to deliver "the lowest price and the shortest time".
To encourage prospective customers, the smuggler has posted a number of passports and visas he claims to have secured.
Like many other smugglers on the platform, he uses photos of landmarks to help catch people's attention.
Here, a different smuggler posts his advert alongside pictures of the Union Jack and Big Ben. In his post he claims he will be able to "make you a British passport".
His offer is eye-catching, with 210 people liking the post and almost 30 comments posted beneath it.
"Hello brother, I want to talk to you," one man writes. "My dear brother, inbox me", the smuggler writes back, inviting him to send him a direct private message.
Images of European flag carrier planes are also used.
Watch: Channel deaths: Lifeboatman recalls 'trauma' of pulling bodies from water - but people are not easily dissuaded by tales of tragedy
In this advert, a smuggler features both British Airways and Air France planes. The final image in his post includes a phone number to call. The photos of the airlines are used without permission and there is no indication that British Airways or Air France are aware the images are being used in this way.
Some adverts do not rely on promises, guarantees and glossy images of the UK. One smuggler simply posts that he can take people from France to Britain and provides a number.
Many adverts are posted into pages used primarily for other reasons, ranging from general community pages to those for an electronic goods store.
However, some pages are set up specifically to discuss smuggling and attract those looking to get into the UK and elsewhere.
One example of this is a group page called "Smuggling to Europe with a guarantee". Its profile and cover photos are images of migrants taken from news sites. It has almost 800 members.
One of the page's most recent posts was published on 10 November and is of a video showing migrants in Dunkirk, France.
Another video shared on these pages includes one from social media app TikTok. It shows part of the journey between Calais and the UK.
It's not just smugglers posting adverts. People post questions about costs and routes. They also share news about other migrant crossings.
One man asks if a German visa would enable him to enter Britain. A profile which appears to belong to a smuggler replies that it wouldn't work. The first man adds if a person can get to Germany, they could attempt to get to the UK "by foot".
Another man asks how much it costs to get into Britain.
Another shares the news of the high number of migrants who died on Wednesday.
Five months ago, Priti Patel wrote to social media companies including Facebook, TikTok, Twitter and YouTube. She said more needed to be done to remove posts that are "glamourising" dangerous migrant crossings.
A spokesperson for Meta, who own Facebook, told Sky News: "Our thoughts go out to all those affected by these tragic events.
"Co-ordinating people smuggling is not allowed on Facebook and we work with law enforcement to tackle it.
"We use a combination of AI technology, human review and reports from our users and trusted partners to detect and remove posts like this."
Sky News understands the pages brought to the attention of Facebook are now under investigation and will be removed if they are found to have violated the platform's policies.
The Data and Forensics team is a multi-skilled unit dedicated to providing transparent journalism from Sky News. We gather, analyse and visualise data to tell data-driven stories. We combine traditional reporting skills with advanced analysis of satellite images, social media and other open source information. Through multimedia storytelling we aim to better explain the world while also showing how our journalism is done.