Little Rooks turns London's child thieves into a source of better loot. It is an Insider upgrade unlocked after Medicine Market.
Little Rooks is entry 3 of 9 in the Insider branch, one of the three branches (Ringleader, Insider and Swindler) on the Rooks' 39-upgrade board. It is bought with money and materials, not skill points: £1,500, 100 Metal, 50 Chemicals. Before Little Rooks unlocks you need Medicine Market.
Explosive Delivery
More explosive crates appear around the city; carry them or light them.
Ale Heist
Ale carts run through the city; hijack or escort them for cash.
Black Market Affiliation
Gun and throwing knife ammunition costs 25% less at every shop.
Carriage Sabotage
Blighter carriages become less resilient.