There has a been a lot of talk about how to trade blocks that are smaller than the LIS waiver but that are still too big to go to regular lit markets. The debate has been ratcheted up by the 4 and 8% dark pool caps that are part of the MiFID II spectre looming above us all. One approach, of course, is to chop your block into smaller pieces with an algo but this is becoming increasingly unattractive in an HFT-dominated world.
Venues like Turquoise have done their bit to help solve for this with their innovative Block Discovery service which has been gaining momentum steadily.