Image caption Protesters marched through Enniskillen, County Fermanagh, where the G8 summit is taking place Image caption All the G8 leaders, from the US, UK, France, Germany, Italy, Japan, Russia and Canada, are in Northern Ireland for the summit Image caption Groups against fracking, tax evasion and world hunger are taking part in anti-G8 protests Image caption Mr Cameron officially welcomed all the leaders to Lough Erne on Monday Image caption As the event started, allegations were made in the Guardian newspaper on Monday that Britain had spied on delegates who attended two G20 meetings in London in 2009 Image caption Some 8,000 police officers have been deployed for the summit Image caption A four-mile long 3m (10ft) high metal fence surrounds the golf resort where the summit is taking place Image caption The two-day summit is expected to focus on global economic issues Image caption The US and EU members of the G8 have announced that talks are to begin on a wide-ranging free trade deal Image caption Mr Cameron said a successful agreement would have a greater impact than all other world trade deals put together Image caption The first day of the G8 passed with only minor trouble Image caption On Tuesday, the summit will turn to tax transparency and counter-terrorism issues Image caption The US said last week it was prepared to arm opposition forces in Syria Image caption Mr Cameron said on Monday that no decision had yet been made on whether the UK would do the same Image caption The G8 summit will end on Tuesday previous slide next slide

A small number of protesters briefly crossed the outer wire perimeter at the G8 summit at Lough Erne.

Riot police assembled in the field and warned the protesters not to pass the next barrier and they dispersed.

Hundreds of protesters marched to the fence from Enniskillen, County Fermanagh, on Monday evening.

Groups protesting against fracking, tax evasion and world hunger took part in a good-natured, six-mile G8 Not Welcome march.

All the G8 leaders - from the US, UK, France, Germany, Italy, Japan, Russia and Canada - are in Northern Ireland for the summit.

At the scene It was a peaceful march that began in brilliant sunshine. There was a carnival atmosphere. One man wore an enormous silver tap on his head and a Scot protesting against poverty bared virtually all to the elements, as he stripped down to a small G-string. Children waved banners, dogs trotted alongside, girls flaunted bikinis with anti-fracking logos and there were chants of "G8 G8 get packin', we don't want your dirty frackin'". The walk to the barrier was a long one and some sat down on the grass, exhausted, keen to take off their shoes and socks and relax at the barriers to Lough Erne. They heard nine speakers protest against greed and war mongering and cheered them on. Then, about 100 to 150 protesters broke off from the main march and headed to a nearby field, getting over some razor wire. The police lined the hill opposite them, riot shields at the ready. But the rally leaders called for this to be a peaceful demonstration. Someone shouted that the buses for Derry and Belfast and Dublin were going - and the crowd started to melt away. "At least the revolution has a bed tonight," somebody joked.

Dozens of onlookers stood in shop fronts and at pub doors in Enniskillen town centre as the noisy but good-natured spectacle passed by.

Many demonstrators were keen to highlight their causes.

'Unfair system'

George Tzamouranis, 48, from Greece, who was brought up in London's Wimbledon and is now living in Belfast, said he had turned out to express his anger.

"I'm angry that capitalism is an unjust, unfair system," he said.

"My sister is a stock market analyst, and is immensely wealthy, yet I've been out of work for 25 years."

Mr Tzamouranis said he had graduated with a degree in Oriental languages, but had been unable to get a job with his education other than casual shift work and remained a victim of capitalism.

"I've been living on the ragged edge since 1991," he said.

Caoimhin Ó Machail, 66, from Dungannon, County Tyrone, said the decision to hold the summit in Northern Ireland was unforgivable.

"It is capitalism gone crazy," he said.

"The money they are spending on it is obscene - why don't they throw them into the desert and let them get on with it?"

Frankie Dean, 50, from Ballinamallard, County Fermanagh, said he wanted to speak up for gay and transgender people being persecuted in Russia and Northern Ireland.

"Obama and Cameron support equal marriage and have done a lot for the LGBT community," he said.

"But Putin and the Russian people are doing bad things to LGBT people. I want to highlight that.

Media playback is unsupported on your device Media caption Jon Brain reports from Enniskillen

"Also while equal marriage is coming into the UK and other countries, it is not in Northern Ireland - and that is because of religious influences.

"I want those in government to come away from these influences and respect people's rights."

'Instigators of austerity'

Elsewhere James Pellatt-Shand, 42, from Canterbury, Kent, said the turn-out was less than anticipated and blamed protesters being scared off from travelling to the area, but said he was delighted with the carnival atmosphere.

His main concern was global hunger and poverty, which he claimed could be easily solved with a bit of goodwill between the rich nations.

"But I think they'll be more likely to discuss how many weapons to give Syria than how many children are going to bed hungry," he said, criticising big companies who avoid tax in developing countries.

"They are just stealing the food out of poor people's mouths."

Anti-austerity campaigners from County Donegal wore giant-sized heads of German Chancellor Angela Merkel, Irish Prime Minister Enda Kenny and Irish Foreign Minister Eamon Gilmore, whom they accused of being her puppets.

Charlie McDyer said: "They are the instigators of austerity in Ireland. They have no consideration for anyone in this country apart from the elite."