Rolling takeoffs aboard HMS Unicorn

Did aircraft aboard HMS Unicorn ever use rolling takeoffs?

Almost certainly; rolling takeoffs were standard, and Swordfish reconnaissance aircraft commonly used them.

Rolling takeoffs were the ordinary carrier launch method before pneumatic and hydraulic catapults became widely available. HMS Unicorn operated aircraft such as the Fairey Swordfish that were well suited to a deck run into wind. Swordfish reconnaissance sorties probably used rolling takeoffs. The seemingly unusual maneuver was normal launch practice for its period.