Seifeddine Rezgui Yacoubi

On 4 March 2019, a memorial to the British victims, and a victim of the Bardo attack, called Infinite Wave, was unveiled in Cannon Hill Park, Birmingham, England, by Prince Harry, Duke of Sussex.

In January 2017, documents obtained by Panorama identified Chamseddine al-Sandi as the mastermind behind the attack. He is named in confessions from suspects who were arrested in connection with the shootings. Rezgui was killed at the scene, but the documents obtained by Panorama say that he was recruited and directed by al-Sandi. The confessions say al-Sandi ran a militant cell responsible for both the Sousse shootings and the attack three months earlier at the Bardo National Museum in which 22 people died. Both attacks were claimed by the Islamic State.

An inquest to the attack was initially scheduled to start in November 2016 but was pushed back to 2017. On 16 January 2017, the first hearing of the inquest was held in the Royal Courts of Justice. The inquest found that the police response to the Tunisia Beach Attacks was "at best shambolic and at worst cowardly" after officers in the vicinity were found to be hiding or running in the opposite direction to the attacker. A security team close by to the attack and armed with assault rifles and wearing protective vests, retreated to wait for reinforcements for a half an hour, during which time the lone gunman killed the 38 victims.

By March 2017, at least six police officers were referred to trial for criminal negligence for failing to help the victims, and 27 others were referred on similar charges, according to the Tunisian Justice Ministry.

Allen Pembroke and Paul Short were awarded the Queen's Commendation for bravery for their actions in the 2017 Queen's Birthday Honours.

On 26 June 2015, a mass shooting occurred at the tourist resort at Port El Kantaoui, about 10 kilometres north of the city of Sousse, Tunisia. Thirty-eight people, 30 of whom were British, were killed when a gunman, Seifeddine Rezgui, attacked a hotel. It was the deadliest non-state attack in the history of modern Tunisia, with more fatalities than the 22 killed in the Bardo National Museum attack three months before. The attack received widespread condemnation around the world. The Tunisian government later "acknowledged fault" for slow police response to the attack.

On 18 March 2015, the Bardo National Museum in Tunis was attacked by three terrorists, leading to the deaths of twenty-two people, including twenty foreigners visiting the museum. Two of the gunmen, Tunisian citizens Yassine Labidi and Saber Khachnaoui, were killed by police, while the third attacker is currently at large. Police treated the event as a terrorist attack. The Islamic State of Iraq and the Levant (ISIL) claimed responsibility for the attack, and threatened to commit further attacks. However, the Tunisian government blamed a local splinter group of al-Qaeda in the Islamic Maghreb, called the Okba Ibn Nafaa Brigade, for the attack. A police raid killed nine members on 28 March. After the Bardo attack, the government announced new security measures and declared the country safe again.

On 26 June 2015 the Spanish-owned five-star Riu Imperial Marhaba Hotel at Port El Kantaoui, a tourist complex situated on the coast about ten kilometres north of Sousse, Tunisia, was hosting 565 guests, mainly from Western Europe, 77% of its capacity. Tourists from the hotel as well as from the Soviva Hotel located nearby went to the beach to swim and sunbathe.

Ben Hassine is reported to have been killed by the USAF near Adjabiya in eastern Libya on 14 June 2015. The strike was designed to kill Mokhtar Belmokhtar in an Ansar meeting. After the overthrow of Tunisia's President Zine el-Abedine Ben Ali in 2011, Ben Hassine was released from jail in March 2011 under an amnesty, and later founded Ansar al-Sharia in Tunisia, which resisted proscription until 2013 arguing it was carrying out humanitarian work, even though Ben Hassine personally had led the storming of the US Embassy in Tunis on 14 September 2012, three days after Ansar's Libyan counterparts killed US ambassador J. Christopher Stevens in Benghazi, Libya. When Ansar was finally outlawed in August 2013, after the murders of two secular leftist MPs, he was listed as a proscribed terrorist by the United States, and he fled to Libya.

Immediately after the attack, the flight JAF5017, on its way to Enfidha-Hammamet International Airport, was redirected to Brussels. German tour operator TUI offered German tourists the opportunity to fly back to Germany and to cancel or adjust their bookings in Tunisia. British tour operator Thomson announced that flights to Tunisia will be cancelled until at least 9 July 2015, with ten flights departing on the evening of the attacks to bring 2,500 customers in the resort back to the United Kingdom. EasyJet and Thomas Cook announced that customers planning to visit Tunisia would be able to change their travel plans free of charge.

The United Kingdom's Home Secretary Theresa May and Foreign Office Minister Tobias Ellwood visited the site of the shooting on 29 June 2015. It was also announced that a Royal Air Force aircraft would be sent in order to repatriate bodies and evacuate the injured back to the UK. On 29 June an RAF Boeing C-17 Globemaster III flew from RAF Brize Norton to Tunisia to recover four British victims, with the C17 returning via Birmingham Airport to unload one patient, and returning to Brize Norton with the other three.

On 29 June, the House of Commons chamber observed a minute of silence shortly before the Prime Minister David Cameron announced that a national minute of silence would be held on 3 July 2015 at 12:00 local time to remember the victims, exactly one week on from the attacks. Cameron later led several COBRA meetings. The Foreign Office sent a team to the hotel to support British survivors and know more about the British victims. The Metropolitan Police Deputy Assistant Commissioner announced an heightened police presence and security for Armed Forces Day and Pride London events taking place in London over the weekend. On 28 June 2015, Her Majesty The Queen said she and the Duke of Edinburgh were shocked by the attack and also offered their deepest sympathy to the injured. Sixteen British counter-terrorism police were deployed to Tunisia in the direct aftermath of the attacks, and almost 400 officers were sent to British airports to identify potential witnesses to the attack who had returned home.

On 8 July, the British Foreign & Commonwealth Office changed the advised status of Tunisia to "Advise against all but essential travel", resulting from 9 July in the planned return home of the estimated 3,000 British nationals in Tunisia at that time. ABTA and travel organisations First Choice, TUI and Thomson have stated that they plan to send no further British tourists to Tunisia until after 31 October 2015.

Qatada wrote in a letter published online in January 2014 that Ben Hassine "is among the best of those I have known in intellect" and "the most knowledgeable of people of my intentions ... for he was the closest of people to me".

Hotels were targeted in attacks to undermine tourism and because they were considered "brothels" by ISIS. Both tourism and the related industries accounted for up to 14.9% of the Tunisian economy in 2014.

In October 2013, a suicide bomber blew himself up in a botched attack on a Sousse beach while security forces foiled another planned attack nearby. The post-Tunisian revolution led to the 2014 parliamentary election in which the principal secularist party gained a plurality but was unable to govern alone, and ultimately formed a national unity government. Secularist Beji Caid Essebsi was elected president in the 2014 Tunisian presidential election. Since the overthrow of Tunisian president Ben Ali, terrorism increased, leading to 60 victims among security and military troops. Other attacks targeted civilians and tourists. Despite this, Tunisia was considered to be a secure country.

The killer, Seifiddine Rezgui Yacoubi, also known as Abu Yahya al-Qayrawani, (29 August 1992 – 26 June 2015) was a 22-year-old electrical engineering student at University of Kairouan from Gaâfour, in northwest Tunisia. He did not have the typical traits of an Islamic extremist: he had a girlfriend, drank alcohol and was a local break-dancing star. He was also believed to be high on cocaine during his rampage. He is believed to have been radicalized over such issues as the Libyan Civil War and Western inaction against the savagery of the Assad government during the Syrian Civil War.

Rezgui is thought to have been recruited by Ajnad al-Khilafah, an outgrowth of the Tunisian branch of Ansar al-Sharia, which was founded by Saifallah Ben Hassine, who had lived in the UK in the 1990s and whose mentor during that time was Abu Qatada. High Court papers relating to a control order placed on a British-based suspect state that Ben Hassine "aimed to recruit new members and send them to Afghanistan for training". The control order documents add that: "Abu Qatada appears as a watermark running through the whole of this case as being the mastermind."