The London Stock Exchange is looking at ways to boost block trading volumes on the anonymous market operated by its Turquoise subsidiary, becoming the latest firm to seek new ways for investors to trade on so-called "dark pools" ahead of new regulations.

Turquoise, the alternative pan-European market that is majority-owned by the LSE, and which also counts the largest investment banks among its shareholders, is consulting with the market on proposals for a "Block Discovery" service, in a bid to increase the number of large trades in its dark pool.