Unsure, depends on how much drilling is going to happen soon. It doesn't cost too much for planning exploration procedures and background work.
Thanks for the data supplied earlier in the thread. The mines now held by NTL delivered about 622,000 oz of gold over a 20-odd year period, with an average grade of 27.8 g/tonne. These days that's a huge grade. The same ore held 129g/tonne of silver. All up 3.5Moz of bullion taken out.
The new Mystery Vein discovered in 1980 is at a more modest grade of 6.9 g/tonne, but that's still OK. 205,000 oz as JORC to start with.