The Ulster Division has the Schawben Redoubtpublished at 09:15 BST 1 July 2016
The Schawben Redoubt is in the hands of the Ulster Division.
Summary
Battle of the Somme - as it happened
Almost 20,000 British soldiers were killed on the opening day of the battle
2,069 men from the 36th Ulster Division were killed at the Somme on 1 July 1916
All times are +1 hour BST
Picture: Attack on Thiepval, Getty Images
The Ulster Division has the Schawben Redoubtpublished at 09:15 BST 1 July 2016
Tyrone volunteer killedpublished at 09:00 BST 1 July 2016
Eric Bell, an officer with the Tyrone Volunteers, is killed. He becomes the second Ulsterman who would receive the Victoria Cross on the first day of the battle.
The battle for Schwaben Redoubt continuespublished at 08:52 BST 1 July 2016
Fighting continues in the Schwaben Redoubt. It is close quarter firing. At times, hand-to-hand.
London Division get into German trenchespublished at 08:40 BST 1 July 2016
Elsewhere, there have been some successes. The London Division is in German trenches and fighting hard near Gommecourt.
Image source, Getty Images36th Division in a precarious positionpublished at 08:30 BST 1 July 2016
The Ulstermen push on, but it soon becomes apparent that they could face counter-attacks from three sides, pushing them right back... or possibly wiping them out.
Image source, Getty ImagesThe other sections of the British advance not going wellpublished at 08:20 BST 1 July 2016
On the 36th's left, the other sections of the British advance are faltering.
Image source, Getty ImagesThe village of Thiepval is still in German handspublished at 08:10 BST 1 July 2016
The fighting is fierce. To the Ulstermen's right, the attack of the 32nd Division isn't going well, and the village of Thiepval is still in German hands. Machine gun fire pours in on them.
Image source, Getty ImagesThe Ulster Division reached Schawben Redoubtpublished at 08:00 BST 1 July 2016
The 36th Ulster Division have reached the Schawben Redoubt.
A third of the men who went over the top were now gonepublished at 07:48 BST 1 July 2016
A third of the men who went over the top are now casualties - killed, injured or missing in action.
No villages have been captured yetpublished at 07:40 BST 1 July 2016
The target was to capture five villages in the first hour of the battle. So far none have been captured. The German defence is resolute.
Image source, Getty ImagesA number of men make it across No-Man's Landpublished at 07:31 BST 1 July 2016
A number of men from the Royal Irish Rifles make it across No-Man's Land and arrive in part of a trench being held by British troops. The 100 or so men are from many different units. It is chaos.
Image source, Getty ImagesBritish forces suffer early casualtiespublished at 07:19 BST 1 July 2016
The British forces are making limited gains, but have already suffered 30,000 casualties.
Image source, Getty ImagesThe British second wave emergespublished at 07:02 BST 1 July 2016
A second wave of British emerge from their trenches. To the south of the 36th Ulster Division are the Lancashire Fusiliers. Their target is Thiepval village. Among their number is a young JRR Tolkien.
Image source, Getty ImagesThe barbed wire isn't cutpublished at 06:59 BST 1 July 2016
The barbed wire isn't cut. The artillery fire hasn't done its job. Men get snagged. Those men who cluster around a break in the wire make for easy targets for the Germans.
Image source, Getty ImagesThe 36th Ulster Division advancespublished at 06:55 BST 1 July 2016
The 36th Ulster Division keeps moving towards its target - the Schwaben Redoubt. It is a strongest German points along the entire western front. A network of trenches and machine gun nests in an elevated position.
Image source, Getty ImagesThe Germans open firepublished at 06:51 BST 1 July 2016
The German machine guns have an optimum range of around 2,000 metres. Many men, including the 36th Ulster Division, are being cut down by bullets coming from a mile and a half away.
Image source, Getty ImagesThe Germans prepare to defend their trenchespublished at 06:44 BST 1 July 2016
German soldiers, having emerged from their deep concrete bunkers, are in position. They're ready to defend their trenches with machine guns and rifles. German artillery is ready too.
Image source, Getty ImagesHeavy bags weigh the soldiers downpublished at 06:41 BST 1 July 2016
Men have been told to walk at a steady but slow pace, in long lines. Many of them are carrying packs weighing around 70 lbs (32kg). Moving fast is an impossibility.
The battle beginspublished at 06:31 BST 1 July 2016
The Battle of the Somme has begun in earnest.
Zero-hour: Over the toppublished at 06:30 BST 1 July 2016
Zero hour. Along the 15 mile front, whistles and bugles are blown. 100,000 soldiers of many nations - English, Irish, Scottish, Welsh, Newfoundlanders, Bermudans, French and French-African climb out of their trenches and move into no-man's land.
Image source, Getty Images