RE:Some Lucara PR It's a bit confusing though.
You're correct that we already knew about the increase in indicated resource but the last news release also tells us that recent drilling has intercepted another ~200m of kimberlite below the current inferred resource.
"Deep drilling which started in 2018 and will continue into early 2019 for geotechnical purposes has intersected South Lobe kimberlite below the current base of the Inferred Resource (256masl) at elevations circa 66masl."