The Association of Police Chiefs has released a document giving information and advice on travel to Syria. This comes on the day a national campaign is launched to stop would-be British terrorists visiting Syria.
The MET police document outlined terrorism risks, what could happen to you if you visited Syria, what the UK government is doing to help Syrians and how you help the Syrian people.
Some of the points outlined in the document are as follows:
Families may face ransom demands.
Assad uses the presence of UK nationals in Syria to support claims that his regime is fighting foreign terrorists.
If you travel for humanitarian reasons, you are very likely to come into contact with terrorist groups and you may get drawn into their activities.
Senior National Coordinator for Counter Terrorism Policing Helen Ball will be hosting a live webchat on the MET website at 2pm.
Nick Clegg has backed the initiative to stop Brits from joining the Syria conflict, warning that the return of radicalised fighters from Syria was "now one of the biggest security threats we face as a country".
"I don't think we should under-estimate the gravity of this now," the Deputy Prime Minister said during his weekly phone-in on LBC radio.
"The security threat to us as a country - on British streets, British towns, British cities, British communities - from people going to Syria and coming back radicalised with violent intentions is now one of the biggest security threats we face as a country.
"It is something the Prime Minister, myself and other members of the Government are very focused on so of course I support the work of the security services and the police."
Police are appealing particularly to British Muslim women to prevent their loved ones from joining the Syrian conflict.
As part of a campaign to curb rising numbers of would-be British jihadis, the country's counter-terrorism unit said it wanted women to be aware of what to do if they feared any men they know may be travelling to the country to fight.
Around 400 Britons are believed to have gone to Syria over the last two years, authorities believe, with an estimated 20 having died, including one man suspected of carrying out a suicide attack.
Abdul Waheed Majeed, 41, is believed to have driven a lorry to a jail in Aleppo before detonating a bomb in February.
Thousands of people walked from Hyde Park Corner to Downing Street to mark the third anniversary of the start of the conflict in Syria. The group says it wants to put pressure on the international community to help friends and family who remain in Syria.
At least 1,000 people are expected to take part in the march to mark three years since the start of the conflict in Syria. The UK Syrian community and their supporters say they will be marching to show their commitment to the cause of freedom in Syria.
The rally will begin at midday at Piccadilly Lane, opposite Hyde Park Corner and will end at Whitehall.
Two women from London will appear in court today charged with arranging funds to facilitate terrorism in Syria.
Amal Elwahabi and from north-west London, and Nawal Msaad, from north London have been charged with terrorism offences that are said to have taken place between January 13th and 16th. The women, who are both in their twenties will appear before Westminster Magistrates' today.