Key Highlights

  • Forrestania Resources (ASX:FRS) has updated its British Hill Mineral Resource Estimate to 5.64 million tonnes at 1.58 g/t gold for 286,300 ounces.
  • The estimate is 35% higher than the previous estimate, which came six weeks earlier, after the inclusion of 19 additional RC drill holes.
  • The Indicated resource rose 45% to 199,800 ounces, and Indicated material now accounts for about 70% of contained ounces.
  • Drilling is continuing with two RC rigs and one diamond rig targeting extensions along strike and down dip.

Forrestania Resources Ltd (ASX:FRS) announced on 9 November 2026 an updated Mineral Resource Estimate for its British Hill gold deposit in Western Australia. The estimate now stands at 286,300 ounces of gold, above the 285,000-ounce level the company had flagged previously. The increase arrives only six weeks after the prior estimate, and it follows the inclusion of results from a recent drilling program.

The Size and Grade of the Updated Estimate

The updated estimate contains 5.64 million tonnes at 1.58 g/t gold at a 0.5 g/t gold cut-off. Forrestania says the increase of 35% reflects the 19 additional RC holes totalling 4,246 metres that were included in the calculation. The growth is attributed to the additional drilling rather than to a change in grade assumptions.

The growth is concentrated in the higher-confidence categories. The Indicated portion totals 3.86 million tonnes at 1.61 g/t gold for 199,800 ounces, up 45% on the previous estimate. The company says Indicated material now makes up about 70% of contained ounces.

How the Growth Was Achieved

The increase follows a drilling program that has been running at pace, with multiple rigs on site. The company has used the program to test both strike and depth, and the resource update reflects results from the holes that were completed and assayed in that period.

Chairman David Geraghty linked the resource growth to the quality of the deposit and the success of the drilling program. No change to the methodology used to estimate the resource is described, so the increase is attributable to new data rather than revised assumptions.

The sequence of updates matters for interpreting the trend. A resource update came six weeks before this one, and both are based on RC drilling that is still continuing. A resource that grows in steps reflects new information being added, which is different from a resource revised because of changed assumptions. Investors following the project can watch whether the next update keeps the Indicated share near 70% of ounces, and whether the Indicated category keeps expanding as more holes are assayed. Any change in the cut-off grade or in the classification method would need to be checked against the company’s disclosure.

Limits of the Resource Update

A larger resource does not by itself establish that a deposit can be mined economically. No Mining study, metallurgical testing outcome or cost estimate is included, and no timing for a possible development decision is stated.

Inferred material is not included in the Indicated figure, and the resource estimate is sensitive to its cut-off and the continuity of mineralisation. Drilling is still targeting extensions, so the estimate can change as new holes are assayed and added.

Final Word

The 35% increase in British Hill’s resource is the most significant measurable outcome so far, and the higher proportion of Indicated ounces gives the figure greater reliability for future planning. Whether the deposit moves toward a development decision will depend on further drilling, technical studies and cost work that has not yet been done. Subsequent drilling updates will show whether the resource continues to grow.

The next update will also indicate whether the company’s stated ambition of growing the resource continues to match the drilling being completed, since the current increase depends on holes that are still being assayed.