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| 1962-jul-25 | Laid down |  L10 HMS Fearless Yard No 1651. | |
| 1962-dec-19 | Laid down | L11 HMS Intrepid | |
| 1963-dec-19 | Launched | L10 HMS Fearless | |
| 1964-jun-25 | Launched | L11 HMS Intrepid | |
| 1965-nov-25 | Commissioned | L10 HMS Fearless at Harland & Wolff | |
| 1966-may-6 | Port Visit | L10 HMS Fearless first foreign port visit, to Brest for four days. | |
| 1966-jul-15 | Trials | L10 HMS Fearless Mediterranean and UK waters propeller trials for 5 weeks | |
| 1966-sep-13 | Deployment | L10 HMS Fearless left HMNB Portsmouth. To support the Civil Power in Aden, until Oct 1966. | |
| 1966-oct-25 | Deployment | L10 HMS Fearless  Operation Fate Deployed to support the Irish Guards in a security operation around the Hauf region of Yemen, near its border with Oman. | |
| 1966-nov-25 | Port Visit | L10 HMS Fearless 4 day visit to Durban | |
| 1967-mar-9 | Deployment | L10 HMS Fearless sailed from Singapore in company with HMS Bulwark for assault exercise off Penang. | |
| 1967-mar-11 | Commissioned | L11 HMS Intrepid | |
| 1967-jun-1 | | L11 HMS Intrepid damage to starboard turbine caused by overheating. 12 weeks repair in HMD Devonport needed. | |
| 1967-oct-17 | Aircraft | L10 HMS Fearless embarked first 8 Wessex of 78 Squadron, for transport to Sharjah. | |
| 1967-nov | Deployment | L10 HMS Fearless until Dec 1967, part of Task Force 318 to cover the British withdrawal from Aden during Operation Magister. | |
| 1967-nov | Deployment | L11 HMS Intrepid until Dec 1967, part of Task Force 318 to cover the British withdrawal from Aden during Operation Magister. | |
| 1967-nov-21 | Aircraft | L10 HMS Fearless embarked the three Sioux of 45 Commando Air Troop, as part of Operation Magister in preparation for their final return to UK. | |
| 1967-nov-29 | Aircraft | L11 HMS Intrepid final departure from Aden, with last 6 Wessex HC.2 of 78 Squadron embarked, heading for Sharjah. | |
| 1968-mar | Deployment | L11 HMS Intrepid off Persian Gulf islands of Tunb, to calm tension with Iran | |
| 1968-sep-20 | Deployment | L11 HMS Intrepid Exercise Coral Sands participated in Exercise Coral Sands with Sioux AH.1 of 3 CBAS embarked | |
| 1968-oct | Port Visit | L11 HMS Intrepid visited Brisbane, after participating in Exercise Coral Sands with 3 CBAS, at least 13 of the unit Sioux AH.1 embarked. | |
| 1968-oct-4 | Deployment | L10 HMS Fearless Operation Diogenes Departed UK. Hosted senior level negotiations from 8 Oct between Britain and Rhodesia (now Zimbabwe) over its declaration of independence (UDI), off Gibraltar. | |
| 1969-jan-15 | Deployment | L10 HMS Fearless sailed from HMNB Devonport for a 3 month Mediterranean and West African deployment, returning on 10 Apr. | |
| 1969-mar | Deployment | L10 HMS Fearless off Lagos (Nigeria), for talks between UK and Nigeria over the Biafra crisis. | |
| 1969-may | Port Visit | L11 HMS Intrepid Visted St Helena | |
| 1969-jun-4 | Deployment | L10 HMS Fearless sailed from HMNB Devonport for a 13 month Far East deployment, returning on 12 Jun 1970. | |
| 1969-sep-22 | Port Visit | L10 HMS Fearless visit to Tokyo for cultural, industrial and educational British Week, until 6 Oct. | |
| 1970 | Refit | L10 HMS Fearless Recommissioned 12 Feb 1971, after refit which included adding Skynet satellite communications equipment. | |
| 1970-aug-29 | Port Visit | L10 HMS Fearless present at Plymouth Navy Days 1970. | |
| 1970-nov-19 | Deployment | L11 HMS Intrepid Operation Burlap to Bay of Bengal to assist in cyclone relief efforts | |
| 1971-aug-28 | Port Visit | L10 HMS Fearless Ship open to visitors at Plymouth Navy Days 1971. | |
| 1971-sep-1 | Deployment | L10 HMS Fearless departed HMNB Devonport for 10 week Mediterranean deployment, returning on 18 Nov. | |
| 1972-nov | Deployment | L10 HMS Fearless participated in Exercise Corsica 72 off W coast of Corsica with HMS Ark Royal, HMS Bulwark, and HMS Intrepid. | |
| 1972-nov | Deployment | L11 HMS Intrepid participated in Exercise Corsica 72 off W coast of Corsica with HMS Bulwark, HMS Ark Royal and HMS Fearless. | |
| 1976-aug-28 | Port Visit | L10 HMS Fearless Ship open to visitors at Plymouth Navy Days 1976. | |
| 1977-jun-24 | Deployment | L10 HMS Fearless Fleet Review: Silver Jubilee of HM The Queen Present at Silver Jubilee Fleet Review, off Ryde Sand | |
| 1978-aug-26 | Deployment | L10 HMS Fearless present for Plymouth Navy Days, with 3 CBAS Scout AH.1 XP893/S embarked. | |
| 1982-apr-6 | Deployment | L10 HMS Fearless Operation Corporate Departed HMNB Portsmouth with some 3 CBAS airframes and three Sea King HC.4 of 846 Squadron embarked, leaving theatre on 24 Jun 1982. | |
| 1982-apr-20 | Aircraft | L11 HMS Intrepid assigned to 845 Squadron
Embarked Wessex HU.5 XT449 / C and XT461 / W of 845 NAS E Flt for two days of working up. The Flight returned to Yeovilton before re-embarking on 26 Apr. | |
| 1982-apr-26 | Deployment | L11 HMS Intrepid Operation Corporate Departed Weymouth Bay for South Atlantic with 845 Squadron E Flt embarked and an 846 Squadron airframe, joining in the English Channel. Left theatre on 26 Jun 1982. | |
| 1983-sep-29 | | L10 HMS Fearless collision with German bulk carrier Gerhardt, off Portland. | |
| 1983-nov-28 | Deployment | L10 HMS Fearless Operation Offcut ordered from UK with 4 Assault Squadron, RM embarked, on 20 Nov with RFA Brambleleaf in support and arrived on station off Beirut, to relieve HMS Glamorgan. | |
| 1985 | | L10 HMS Fearless into low readiness reserve for 3 years, until 1988. | |
| 1986-oct-22 | Deployment | L11 HMS Intrepid departed HMNB Portsmouth for Middle East and Gulf of Arabia deployment. Embarked 40 Commando Royal Marines and 2x Sea King HC.4 from 846 NAS and returned Dec 1986. | |
| 1986-nov-20 | Deployment | L11 HMS Intrepid Participated in Exercise Saif Sareea 86 between 20 and 30 Nov 1986, off Masirah Island. | |
| 1989 | Refit | L10 HMS Fearless  CIWS Phalanx 20 mm refit at HMD Devonport, including replacement of guns and her 4x quadruple Seacat launchers for new 20mm and Phalanx CIWS. Completed 1991. | |
| 1991-apr | Struck | L11 HMS Intrepid Laid up for long term storage at Portsmouth. Some equipment canabalised for use in HMS Fearless. | |
| 1991-oct-10 | Deployment | L10 HMS Fearless deployed to Sevastolpol, Ukraine with 2x 656 Sq Lynx AH.1 | |
| 1998-aug-28 | Deployment | L10 HMS Fearless International Festival of Sea Participated in IFoS 1998. | |
| 1999-aug-31 | Decommissioned | L11 HMS Intrepid | |
| 2000-nov-2 | Deployment | L10 HMS Fearless serious boiler fire while operating c 150nm off Sicily, brought under control with difficulty and much skill by the ships company. Damage caused her to sail for Malta for assessment and to be relieved from her planned mission to Sierra Leone (Operation Basilica) by RFA Argus. | |
| 2001-aug-20 | Deployment | L10 HMS Fearless left HMNB Portsmouth for 7 month Persian Gulf and Indian Ocean deployment, returning 18 Mar 2002. | |
| 2002-aug-3 | Homeport | L10 HMS Fearless paid off for final time at HMNB Portsmouth | |
| 2003 | Decommissioned | L10 HMS Fearless | |
| 2005-jul | | L11 HMS Intrepid by Jul 2005 was laid up in Fareham Creek | |
| 2005-jul | | L10 HMS Fearless by Jul 2005 was laid up in Fareham Creek | |
| 2007-dec-17 | Fate: scrapped | L10 HMS Fearless towed from Portsmouth to Van Heyghen yard at Ghent, Belgium for scrapping | |
| 2008-sep-13 | Fate: scrapped | L11 HMS Intrepid towed from Portsmouth to Birkenhead for breakers yard at Canada Dock and scrapping completed by Aug 2009 | |
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