Britain on Thursday advised its nationals in Tunisia to leave, warning that local authorities could not provide "adequate protection" after last month's beach massacre that left 30 Britons dead.

"While we do not have any information suggesting a specific or imminent threat, since the attack in Sousse the intelligence and threat picture has developed considerably, leading us to the view that a further terrorist attack is highly likely," Foreign Secretary Philip Hammond said.

A coach driver died and another was seriously injured on Sunday when their vehicle overturned on a Belgian highway with 34 British schoolchildren on board, an official said.

One of the children, all aged between 11 and 13, was in intensive care receiving treatment for a head injury, the school said.

Twelve students including British, Canadian, Sudanese and U.S. citizens are feared to have traveled from Khartoum to Turkey to try to join the Islamic State (IS) group, their university's dean told AFP Sunday.

Another group of British students of Sudanese origin from the same private University of Medical Sciences and Technology traveled to Turkey in March and it is believed they crossed into Syria.

Britain's Queen Elizabeth II visited a former Nazi concentration camp for the first time during a state visit to Germany Friday, meeting Holocaust survivors and British veterans who helped liberate the site 70 years ago.

The trip to Bergen-Belsen in northwestern Germany by the 89-year-old queen -- accompanied by her husband, Prince Philip, 94 --  was a "personal visit" and "her wish", sources said.

Britain's Queen Elizabeth II arrived in Germany Tuesday for a much anticipated state visit that also includes a trip to a former Nazi concentration camp liberated by British forces 70 years ago.

The 89-year-old queen and her husband Prince Philip, 94, touched down in her private plane for the three-day multi-stop visit, at a time when Britain is seeking support from the eurozone's top economy for its EU reform wish list.

Prince Harry ended his career with the British army on Friday after 10 years' service that saw him fight on the front line twice in Afghanistan.

The 30-year-old will spend the next three months working on wildlife conservation projects in Botswana, Namibia, South Africa and Tanzania, where he will join a team of rangers fighting against poachers of elephants and rhinos.

Two British fathers whose wives and children are suspected to have traveled to join jihadists in Syria made tearful appeals for them to return home on Tuesday.

The 12 family members, from Bradford in northern England, went missing after traveling to Medina in Saudi Arabia for an Islamic pilgrimage.

British Prime Minister David Cameron defended London's claim to the Falklands during a confrontation with Argentina's foreign minister at a summit in Brussels Wednesday, sources said.

Hector Timerman brought up the subject of the disputed South Atlantic islands, over which Britain and Argentina fought a war in 1982, during a EU-Latin American summit involving more than 60 countries, they said.

An overwhelming majority of young Brits want to remain within the EU, a new poll showed Tuesday, adding that as the euro crisis fades support for European integration is rebounding.

After reaching a low point two years ago in the wake of the economic crisis, the popularity of the European Union is growing again despite the rise of Euroskeptic parties, the Pew Research Center said.

Prime Minister David Cameron's government confirmed it will hold a referendum on whether Britain should leave the EU Wednesday in a policy speech read by Queen Elizabeth II on Westminster's grandest day.

The 89-year-old monarch also set the stage for further budget austerity under Cameron's newly elected center-right government but promised measures for "working people" such as more free childcare.