Sorry to dampen the excitement, but the Nepean pegmatites are...

Sorry to dampen the excitement, but the Nepean pegmatites are too close to the granite for lithium minerals to crystallise. Spodumene, lepidolite etc crystallise in complex pegmatites which are late-stage melts, plus there is a characteristic mineral zoning which puts the main lithium zone ~3 to 10km from the granite. It's the "goldilocks zone" - refer to earlier announcements by David Crook at Pioneer for a better explanation.
At Nepean the granites are on either side just a handful of metres away.
LIT had a lithium agreement with FML at Lepidolite Hill, which is north towards Londonderry but I think they relinquished it a while ago.

Also of interest google "Londonderry the golden hole" for a classic gold-rush era history of one of the richest gold occurrences of its time, briefly listed on the London exchange before going bust in spectacular fashion (not a reflection on AOU in any way, just a fascinating piece of Coolgardie history). There's a Londonderry pegmatite quarry and a Londonderry gold working, near each other but not the same thing.