Families of Britons killed in bombings abroad have called for greater financial help, as a memorial was held for victims of three attacks.
Candles were lit at the altar for each of the 13 killed
Relatives spoke after a London service that remembered 13 Britons killed in Sharm el-Sheikh, Kusadasi and Doha.
They say that while victims of terror attacks in the UK are compensated, those affected by attacks outside the country are being neglected.
The government said a £1m fund for such circumstances had been set up.
Prime Minister Tony Blair, his wife Cherie and Prince Andrew joined relatives at the memorial service in Southwark Cathedral.
Other dignitaries included Tory leader David Cameron, Home Secretary John Reid and Culture Secretary Tessa Jowell, who gave a reading from the Bible.
Families chose hymns for the service as well as two poems - one written by Peter Fulham, who lost his son Matthew in the Sharm el-Sheikh bomb attacks.
"Our heart still aches in sadness," Mr Fulham wrote.
A relative of each of the victims lit a candle of remembrance on the altar. Those at the altar included two young boys.
The names of the 13 victims were also read out.
Opening the service, the Dean of Southwark, the Very Reverend Colin Slee, said it was being staged to "remember 13 people whose lives ended violently, indiscriminately and suddenly in three attacks", as well as those who were injured.
"Those who lived through these terrors will bear the mental and physical scars all their lives," he added.
'Hearts and minds'
The Bishop of Lincoln, the Right Reverend John Saxbee, told the congregation any war on terror would be won through "a battle for hearts and minds".
"Moral and spiritual strength may matter more than military might when it comes to winning this war and securing long-term peace and stability," he added.
Speaking after the service, Angela Corke, whose daughter Annalie Vickers - together with boyfriend Jeremy Lakin - died in the Sharm el-Sheikh bombings, said the "lovely service" had "helped a great deal".
But she said not enough help was given to bereaved relatives and survivors of foreign attacks.
"What we do need is for the government to recognise that a British citizen is a British citizen whether they're in the UK in an atrocity or abroad," she told BBC News.
"They're in the front line and they and their families need to be looked after. Australia does it, France does it, the USA and Italy all look after their victims of terrorism abroad and we have to start doing that."
And Mr Lakin's father Trevor, who gave a reading at the service, called for a "sustainable fund" to help those affected by attacks abroad.
The relatives met Mr Blair after the service.
Mr Blair's official spokesman said the government recognised the relatives felt "aggrieved".
"Our [Criminal Injuries Compensation Authority] scheme compensates those who become victims in this country, no matter where they are from and many countries have reciprocal agreements," he added.
"The problem arises where those don't exist.
"We are looking at the options for bridging that gap but that may take some time."
The £1m charitable fund had been introduced "in the meantime", he added.
Britons killed in Sharm el-Sheikh, Egypt, 23 July 2005Leslie AyersAlan BentleyNoleen BentleyValerie BracciKeri DaviesMatthew FulhamCharith JayawardenaJeremy LakinAnnalie VickersHannah LloydDavid Sayer
Briton killed in Kusadasi, Turkey, 16 July 2005 Helyn Louise Bennett
Briton killed in Doha, Qatar, 19 March 2005 Jonathan Adams