RE:BK2
This is a company that tells the bare minimum.
They could have shared all sorts of technical detail about BK2 and the other targets being worked on but they choose not to. One likely reason might be 'competitor' and/or security concerns.
Notwithstanding that, we can make some guesses about how long BK2 might take to bulk sample.
Although the purpose-built bulk sample plant located at Karowe appears to be self-contained, we don't know if they are pre-crushing and/or concentrating at the target. The 2 photos we have of BK2 and AK12 only show a single digger.
So if we assume that all the diggings have to be transported to Karowe over public roads then we are looking at 5000 tonnnes of BK2 transported in, say, 10 ton loads. (= 500 loads)
If, for example, they can dig (only 1 digger visible), transport and process 3 loads per day then it will take 500/3 = 166 days............and pro-rata for other capacities.
Must be pretty soon anyway.
A big unknown is how long it might take to fully analyse the results.