THE HORROR OF Bloody Sunday unfolded after days of mounting tensions in Derry.

A week before the fatal shootings, soldiers had fired plastic bullets and CS gas at protesters at a banned civil rights demonstration on Magilligan Strand near Derry.

Four days later, two Royal Ulster Constabulary officers – Constable David Montgomery, 20, and Sergeant Peter Gilgunn, 26 – were shot dead by republicans in the nationalist Creggan area of the city.

The men were the first policemen killed in Derry during the Troubles.

While the mood in the city was tense when the morning of January 30 arrived, few could have predicted the bloodshed that followed.

It was just after lunchtime when demonstrators started assembling on the Creggan estate for the latest Northern Ireland Civil Rights Association (Nicra) protest march, an event outlawed by a Stormont ban on large public assemblies and processions.

This time the destination was the city’s Guildhall.

2.50pm:

Due to get under way at 2pm, the start is delayed by 50 minutes to accommodate the steady stream of late arrivals.

Marchers leave Creggan Drive and set off for the city centre, with hundreds joining in at almost every turn.

3.25pm:

The march passes the Bogside Inn bar and continues on to William Street.

Estimates of the size of demonstration at this point vary. Organisers claimed up to 20,000 people were involved, while the authorities put it at a more conservative 3,000 to 5,000.

3.45pm:

With the British army having erected barricades blocking the way to the Guildhall, the main body of the march turns left on to Rossville Street towards the revised rallying point at the famous Free Derry corner at the entrance to the nationalist Bogside estate.

A number break off and continue down William Street to confront soldiers at a barricade. Some rioting ensues.

Minor clashes between stone-throwers and security forces at this junction were commonplace, with locals dubbing the area “aggro corner”.

Commemoration mural in the neighbourhood area of the Bogside in Derry, that contains portraits of the 14 people who were killed by the British Army on Bloody Sunday in 1972. PA PA

3.55pm:

Before the main shooting incident, and at a location away from both the riot and march, two soldiers in a derelict building on William Street fire a number of rounds after claiming they had come under attack.

An Official IRA member is believed to have fired at the building during this incident.

Two men are injured when the soldiers opened fire.

One of them, 59-year-old John Johnston, dies four months later.

Campaigners have long acknowledged him as the 14th victim of Bloody Sunday.

However, the Bloody Sunday inquiry said the wounds he sustained on the day did not contribute to his death, noting he had an inoperable brain tumour.

3.56pm:

Rioters disperse from William Street after the army deploys water cannons.

Paratroopers request permission to commence an arrest operation on those who had fled down Chamberlain Street and Rossville Street.

4.07pm:

A company of paratroopers, led by Major Ted Loden, is given an order to start arresting any remaining rioters in William Street. But they are told not to engage in a running battle down Rossville Street.

4.10pm:

The soldiers open fire on people in the area of Rossville Flats.

Where the victims were shot:

– Car park of Rossville Flats: Jackie Duddy.

– Forecourt on the other side of the flats: Pat Doherty, Barney McGuigan.

– Rubble barricade in Rossville Street beside the flats: Hugh Gilmour, Kevin McElhinney, Michael Kelly, John Young, William Nash and Michael McDaid.

– Glenfada Park on other side of Rossville Street: James Wray, Gerald Donaghey, Gerald McKinney and William McKinney (not related).

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4.40pm:

The shooting ends.

As well as the 13 fatalities, 15 other people are wounded.

More than 20 soldiers fired in the incident, expending 108 rounds in total.

The British Army claims it came under fire in the Rossville Flats area, allegedly from the Provisional IRA.

Eyewitnesses insist none of the dead were armed.

Commemorations 

President Michael D Higgins, Taoiseach Micheal Martin and former UK Labour Party leader Jeremy Corbyn will feature in a programme of events to mark the 50th anniversary of Bloody Sunday this weekend.

President Higgins will deliver a recorded message to the Bloody Sunday families on Sunday, which will be shown publicly during the commemorative event Beyond the Silence, which will take place before a limited audience in Guildhall Square.

His message will be broadcast on a large screen and the occasion will be livestreamed to an online audience.

Guildhall Square will fall then silent on Sunday at the precise time when 50 years earlier paratroopers opened fire on civil rights marchers in the Bogside.

Earlier on Sunday, relatives of those who were shot and injured will take part in a walk of remembrance which will set out from Creggan Shops and make its way to the Bloody Sunday Monument in Rossville Street for the annual memorial service and wreath-laying ceremony at 11am.

Micheál Martin will lay a wreath and is also expected to meet privately with the families of those killed.