Byron Energy Limited provided a summary of the independently assessed estimates of reserves and resources for the Company's projects in the shallow waters of the Gulf of Mexico. The report covers Byron's leases around the South Marsh (SM) 73 salt dome comprising SM71, SM58, SM 57/60/69 and Eugene Island Block 62/63/76/77 (EI77). The independently assessed reserves and resources estimates were prepared by Collarini Associates ("Collarini"), based in Houston, Texas, USA. Reserve Additions/Revisions: 1 July 2020 to 30 June 2021companywide annual production of 1,020 MBO and 5.4 Bcfg (gross) or 454 MBO and 4.2 Bcfg (net to Byron), from the Byron operated SM71 and SM58 fields and the SM58 E1 well. Byron's companywide field level cash opex averaged less than USD 5.50 /boe during the year. At Byron Operated SM71 Field the replacement of approximately 128% of the Company's annual production of 900 Mbo and 0.9 Bcfg (gross) in the Proved Developed Producing category. The reallocation from Probable and Possible to Proved Producing (PDP) reserves of approximately 530 Mboe (net to Byron) which is the result of a SM71 D5 Reservoir bulk volume increase based on the continued water-free oil production and stable performance from reservoir in the SM 71 F1 and F3 wells. This performance has further confirmed the accuracy of the seismic data in this area. The addition of 560 Mbo of total Proved reserves at SM58 area due to the addition of G2ST J Proved Developed Behind Pipe, and the addition of Proved Undeveloped reserves in the following plays, Silver Trout Upper O1, Smoked Trout N2 & K4, and Steelhead South L2. Reduction of the SM58 Cutthroat G1 Incremental Probable oil reserves of 2.2Mmbo and 2.9Bcfg, and Incremental Possible oil reserves of 1.8Mmbo and 2.3Bcfg (net to Byron) was due to the reclassification of these G1 Upper O oil reserves to Prospective Resources due to performance indicating separate reservoir containers and the necessity for a future well or sidetrack to access such reserves.