Ann: Market Update - Activities, page-8

I think that the mould issue threw a spanner in the works in the short term as it cultured quicker than the TB, and just reading between the lines there they were doing surface tests as well as air borne tests.
So they need the tests results for both to be equivalent before going to market with the upmost confidence, hence The company is fully expectant that this testwork will produce successful results.”

If spring is going to be a deadline they are hoping for then "commercialization activities, including set up of US operations" are well and truly under way.