1994–2000

In early August 1995, Operation Harlech was initiated in response to a volcanic eruption in Montserrat. The Westminster arrived off the island on 9 August and provided emergency relief aid. The ship was joined by HMS Southampton on 19 August, both ships provided emergency relief assistance until the end of the month.^[6]

Westminster was used for the interior shots in the 1997 James Bond film Tomorrow Never Dies as three different (fictional) Type 23 frigates – HMS Chester, HMS Devonshire and HMS Bedford.^[7] For the exterior shots HMS Somerset was used with some features added by model construction.^{[citation needed]}

On 3 February 1999, Westminster joined the Atlantic Patrol Ship South, relieving HMS Norfolk which was taking part in Operation Basilica in Sierra Leone. When the situation improved it was decided to withdraw Westminster and she sailed from the area on 18 March.^[6]

2001–2010

In 2004, Westminster was assigned one of the Royal Navy's first Merlin helicopters.^[8] Also in 2004, the ship was the first to be fitted with the new low-frequency Sonar 2087 designed to detect the most advanced submarines. The technology is controversial as its effects on marine wildlife remain unclear.^[9]

In December 2005, the ship's company of Westminster were all granted Freedom of the City of Westminster. 200 naval officers and sailors in full ceremonial uniform paraded through the streets of London from Westminster Abbey to Horse Guards as part of the celebration service. Westminster was chosen as a very rare recognition of her contributions to Westminster schools, local charities and the community as a whole. The honour entitles the crew the freedom to "parade through the City on all ceremonial occasions in full panoply and with drums beating, colours flying and bayonets fixed".^[10]

The frigate was deployed to Burma in May 2008 to spearhead the British relief effort after Cyclone Nargis devastated the country, but later had to withdraw after the junta refused to grant permission for aid to be landed.^[11]

2011–2022

In March 2011, Westminster took part in Operation Ellamy, the British role in the coalition action during the 2011 Libyan civil war by enforcing a naval blockade.^[12] She took part in Exercise Saxon Warrior in the Western Approaches with the US aircraft carrier George H.W. Bush in May 2011, culminating in a so-called 'Thursday War'.^[13]

On 23 January 2012, Westminster departed Portsmouth to reinforce the British guided-missile destroyer Daring that was also underway for the Persian Gulf to relieve the frigate Argyll.^[14]

Whilst in the Persian Gulf she made a port call in Dubai where one of her sailors (Leading Seaman Timothy Andrew MacColl, 27, from Gosport in Hampshire)^[15][16] disappeared, prompting a bilateral search between the Royal Navy and local authorities. He was declared dead by the Royal Navy in May 2014.^[17]

In early 2013, she was part of the multi-national Exercise Joint Warrior, practising amphibious operations off the coast of Scotland.^[18] In September she was part of the COUGAR 13 task group, for a series of joint exercises in the Mediterranean and Persian Gulf.^[19] She visited Gibraltar on the way to the Middle East. This came amidst growing tensions between Spain and Britain over the status of Gibraltar; however the British Government described the visit as 'routine'. In September 2013, she practised anti-submarine drills with the Italian Navy's Sauro-class submarine Salvatore Pelosi and the Durand de la Penne-class destroyer Francesco Mimbelli.^[20] In the Gulf of Oman, Westminster conducted anti-submarine drills against USS Dallas.^[21] In October 2013, she exercised with the Indian Navy off Goa.^[22]

On 8 September 2014, she docked at East India Dock, by Canary Wharf, in London. In November 2014, Westminster entered extended refit in Portsmouth; she returned to sea in January 2017 with a new principal weapon system, Sea Ceptor, in place of Seawolf, Radar Type 997 (better known as Artisan) and numerous modifications and alterations to her accommodation and working spaces.^[23]

Westminster, in company with Iron Duke sailed with USS George H.W. Bush again, as in 2011, by taking part in Exercise Saxon Warrior off Scotland.^[24]

During December 2018 on a tour of the Baltic Sea, Westminster experienced problems with her propulsion and engines while visiting the port of Gdynia, curtailing other port visits in the region.

In July 2020, she took part in NATO exercise Dynamic Mongoose.

In September 2022, Westminster fired two Harpoon missiles in Operation Atlantic Thunder 22 in a SinkEx exercise alongside US forces in which the decommissioned US frigate USS Boone was sunk in the North Atlantic.^[25][26]

In 2022, Westminster spent 90 days at sea.^[27]

Westminster entered a planned two-year refit in October 2022 with the intent of extending her service life until 2028–29.^[28]

2023–present

In May 2023, it was reported that the refit had been suspended due to the poor material condition of the ship, making her future uncertain.^[29][30]

In January 2024, it was reported that Westminster may be decommissioned and the crew reassigned to a future Type 26 frigate.^[31]