| 1941-nov-01 | Laid down | Laid down  F197 HMS Grenville Yard No. 1669 | |
| 1942-sep-08 | Laid down | Laid down F53 HMS Undaunted as Ulster Class destroyer, HMS Undaunted. Yard No. V.1104 | |
| 1942-oct-12 | Launched | Launched F197 HMS Grenville from SW Wallsend Yard. | |
| 1943-may-27 | Commissioned | Commissioned F197 HMS Grenville as Rapid class HMS Grenville (R97) | |
| 1943-jul-09 | Launched | Launched F53 HMS Undaunted launched at Birkenhead as Ulster class destroyer | |
| 1944 | Commissioned | Commissioned F53 HMS Undaunted as Ulster Class, pennant R53. | |
| 1946-jan | Refit | Refit F53 HMS Undaunted completed refit and departed Auckland, NZ and returned to Devonport, UK after war service with the British Pacific Fleet, on 19 Mar 1946. | |
| 1952 | Refit | Refit F53 HMS Undaunted until 1954 into Type 15 fast anti-submarine frigate, by JS White and assigned pennant F53 | |
| 1953 | Refit | Refit F197 HMS Grenville until 1954, conversion at HMD Chatham from a Rapid class frigate (R97) to Type 15 standard | |
| 1957-feb | Trials | Trials F197 HMS Grenville fitted with flight deck aft for later use in English Channel with Fairey Ultra Light G-AOUJ | |
| 1958 | Refit | Refit F53 HMS Undaunted Fitted with raised flight deck aft for P.531 trials | |
| 1958-oct-23 | | F197 HMS Grenville minor damage during collision in Portland Harbour | |
| 1958-dec-24 | Deployment | Deployment F53 HMS Undaunted In collision with HMS Maxton, whilst patrolling off Cyprus | |
| 1959-nov-09 | Trials | Trials F53 HMS Undaunted P.531 trials commenced with XN333 and XN334 during Nov, including some tactical trials with HM Submarine Tireless | |
| 1960-aug | Deployment | Deployment F53 HMS Undaunted Ship open to visitors at Plymouth Navy Days 1960. | |
| 1962 | Refit | Refit F53 HMS Undaunted original (1958) flight deck updated to become more permanent with lessons learned from P.531 and Wasp trials. | |
| 1966 | Refit | Refit F53 HMS Undaunted emerged from refit at HMD Chatham | |
| 1967 | | F197 HMS Grenville far east cruise in 1967-69. After a fire on HMS Agincourt many of the crew were transferred to Grenville. After work up she did a Mediterranean cruise then joined the second destroyer squadron Far East fleet [Cdr George Brewer]. When she returned to Portsmouth the lattice mast was removed and she painted her black 2 red anhd joined the 2nd Frigate squadron as a radar trials ship | |
| 1967-mar | Aircraft | Aircraft F53 HMS Undaunted working up for Wasp operations, temporarily with 829 Sq Wasp HAS.1 XS571/476-LE from HMS Leander | |
| 1969-dec-09 | Aircraft | Aircraft F53 HMS Undaunted Londonderry Flt Wasp XV637/447-LD ditched S of St Albans Head while operating from HMS Undaunted, 9 Dec 1969 | |
| 1974 | Decommissioned | Decommissioned F53 HMS Undaunted | |
| 1974-apr | Decommissioned | Decommissioned F197 HMS Grenville | |
| 1978-nov | Fate: sunk | Fate: sunk F53 HMS Undaunted sunk as a target off Casablanca, by Exocet from HMS Norfolk or some authorities claim by torpedo from HMS Swiftsure. | |
| 1983 | Fate: scrapped | Fate: scrapped F197 HMS Grenville towed from Devonport to Portsmouth late 1979, then on to Isle of Sheppey for scrapping. | |
| 2012-aug-18 | | F53 HMS Undaunted Ship s Bell (1966) still in safe keeping at Sea Cadet unit TS Jersey on Jersey, CI | |
Aircraft