They say the boxes represent living conditions in Gaza, and their protest shows the conditions faced by people trapped by the blockade.
Hendrick Van Der Mescht is to cycle 15,000 miles across 13 countries to raise money and awareness for ex-servicemen who suffer from PTSD.
Take a look at the pictures as London plunged into darkness last night, to pay tribute to those who lost their lives in World War One.
The outbreak of war 100 years ago was being remembered today at a war memorial vandalised by metal thieves. Civic leaders at Enfield in North London have chosen to hold their commemoration at Broomfield Park in Southgate.
Bronze plaques bearing the names of 550 local heroes from the 1914-18 conflict were stolen in 2009.
The valuable metal memorials were never recovered but have been replaced by wooden replicas.
– Cllr Doug Taylor, Enfield Council Leader,
I think we've been able to return it to its original look and I think it will be there for generations to come and that's important.
The Great War Centenary Parade takes place through London today - a procession of more than 40 Edwardian cars - all of which would have been on the road during the First World War. Prince Michael of Kent and 50 Chelsea Pensioners will take part in the event.
David Cameron said the First World War "profoundly changed our world" as he paid tribute to the sacrifice made by those who lost their lives.
Speaking outside Glasgow Cathedral ahead of a service of commemoration for Commonwealth leaders, the Prime Minister said it was important to find new ways of bringing the experiences of those involved in the conflict to life.
– David Cameron
It was an extraordinary day in Britain's history, and when you think that almost every family, almost every community was affected... Almost a million British people were lost in this war, it's right that almost a hundred years on we commemorate it, we think about it and we mark it properly.
He also told BBC Breakfast: "I think it is important to remember the outbreak of the war.
"Because although there was an enormous amount of waste and loss of life, there was a cause that young men rallied to at the beginning of the war, which was the idea that Europe shouldn't be dominated by one power, that a country, a small country like Belgium shouldn't be simply snuffed out."
David Cameron has paid tribute to the "extraordinary sacrifice" of the First World War generation as Britain commemorates the 100th anniversary of WW1.
PM: It is right to remember extraordinary sacrifice of a generation. We are indebted - their most enduring legacy is our liberty #WW1Aug4
This archive image shows Adolf Hitler in the crowd hearing the announcement of the First World War on August 2, 1914.
After Nazi Germany became a reality, Hitler mentioned that he had been outside Field Marshals' Hall in Munich when the declaration of war was revealed.
A German photographer then went through his old pictures of the event and found the image.
Hitler was 25 years old when the First World War broke out. He enlisted in the Bavarian army and rose to the rank of lance corporal, but no further.
A newspaper inspired by the historic Wipers Times created by First World War soldiers has been recreated to mark the centenary of the war.
The Flanders Fields Post newspaper will be published as a one-off today and distributed in London, Glasgow and Manchester.
The publication is inspired by the famous Wipers Times - the original trench newspaper produced by frontline soldiers during the Great War.
It was first produced by Captain FJ Roberts and Lieutenant JH Pearson in 1916 whilst being stationed in Ypres and contained plenty of humorous, satirical in-jokes, poems, mockery of the prevailing military situation.
Captain Roberts' grandson Nick Roberts, 67, said: "To think that while being under enemy fire, my grandfather and other soldiers were able to produce the Wipers Times is quite incredible."
He said today's newspaper was "his turn" to make sure his grandfather was recognised for his contribution to improving troops' morale.