Defence Secretary Liam Fox has announced £500,000 and extra military expertise to help Libya in the battle against arms proliferation.
The package of support was announced during his first official tour of the state - a visit which has been overshadowed by a series of allegations at home about his working relationship with former flatmate Adam Werritty.
Dr Fox flew out to Tripoli on Friday night and held talks with National Transitional Council (NTC) chairman Mustafa Abdul Jalil and defence minister Jalal al-Digheily on progress of military operations in the country and the new government's plans for security.
That includes the future shape and structure of the Libyan armed forces and how to manage the eventual end of UN operations.
Dr Fox travelled to Misrata on Satruday, where injured fighters loyal to the interim government and civilian patients injured during the conflict are recovering.
He said: "I am delighted to be making my first visit to Libya, and to have the opportunity to discuss with chairman Jalil how the United Kingdom can continue to provide assistance in the long term, particularly in terms of support with counter-proliferation expertise and transition to a stable future.
"Those still fighting in Sirte and Bani Walid should take stock of what is going on around them. The country is now free from the tyrannical grip of the Gaddafi regime and, for them, it is quite clear that laying down their arms is the only avenue open to them if they wish to part of a peaceful, prosperous and democratic future for the people of Libya.
"It is thanks to the decisive steps taken by the UK and the international community that a massacre by Gaddafi's forces was avoided in Benghazi and Misrata. I am incredibly proud of all the personnel of the British Armed Forces who were involved and I would like to reiterate my thanks to them for achieving what they have."
As well as the money, two extra military advisers have also been assigned to support the NTC, the Defence Secretary said.
The package of support comes on top of pledges made by Mr Cameron in Libya last month for £1 million from the UK Government's Conflict Pool and the deployment of two military advisers.