Diligence provided damage repair work many times during her lifetime. At the end of the
Iran–Iraq War, the
Straits of Hormuz were mined, and
Diligence supported the multinational minesweeping operation to clear that vital chokepoint.
Diligence also helped to repair after collision damage. The ship returned to the Persian Gulf in 1990 to support operations during the
Gulf War by repairing, among others, two American ships damaged by mines. In 1995, according to British reports,
Diligence was confronted and illuminated by the radar of the Argentine corvette , which was harassing shipping near the Falklands. ,
HMNB Clyde, Scotland. During Operation Ocean Wave 97,
Diligence deployed to the Far East as a submarine support ship. The following year, the ship supported 3rd Mine Counter-Measures Squadron in the Persian Gulf. Following just two weeks in the UK,
Diligence departed for the south Atlantic, returning to
Faslane in December 1998. Early 1999 saw the ship again deployed to the Falklands region. 2001 saw a large exercise in Oman, and
Diligence supported the four
MCMVs involved. The ship's next wartime assignment came with the large
taskforce deployed against Iraq in 2003. Returning to familiar territory,
Diligence supported the largest British fleet deployed since the
Falklands War. When the ship returned to UK in November 2006 she had the longest deployment of an RFA in recent times. From her departure from
Portsmouth it was 5 and half years before she returned home to Portsmouth. In that time she has visited 25 different countries whilst steaming some , through the Mediterranean to the Persian Gulf, across the Indian Ocean to India, Sri Lanka and Singapore, the South China Sea to the Philippines and from South Africa across the Atlantic to the Falklands and South America. Many of these Oceans and countries visited 2 or 3 times. All this work took its toll on the 25-year-old ship, and the ship was given a £16 million overhaul during 2007 at Northwestern Shiprepairers and Shipbuilders in
Birkenhead. Her accommodation areas,
galley and
engine room were all upgraded, with the intention of extending the ship's service life until the middle of the next decade. The overhaul was completed in December 2007. A £17.6m refit was carried out from June 2012 to February 2013 ahead of a deployment to the Mediterranean and Gulf region in support of the COUGAR 13 task group. An £11m refit followed from September 2014 to February 2015, As of 2016, no replacement for the ship had been identified and the 2021 British defence white paper made no mention of the need for any such capability. In March 2017,
Diligence was towed from Birkenhead to Portsmouth where she awaited a potential buyer. In April 2023, it was revealed that the ship was to be scrapped after no suitable buyers materialised, and in March 2024 she departed the UK for the final time, under tow to a scrapyard in Turkey. ==References==