Ann: Lithium Drilling Recommences at Burmeister, page-118

The map below was in E25's quarterly. The lower area you circled is E25 so they are TG6's immediate neighbour on several tenements. Most of the upper area circled is Poseidon Nickel although there are a couple of tenement blocks that I presume they needed to relinquish and are now in highly contested ballots (10 and 20 applicants from memory). TG6 is in both ballots but obviously the outcome is unclear. The map below is from Poseidon's quarterly

From this map you can see that there are more than just the Medcalf and Burmeister targets in the region.