Around twenty people took action against Fluent UK on Tuesday, Sep 2. The activists protested against the use of Fluent's software for modelling flow around missiles.

Four people barricaded themselves inside the revolving doors to the Fluent office close to Sheffield airport using door stops inside to stop the doors rotating. Two more used bicycle D-locks to lock themselves to the doors by their necks. Anyone entering the building was forced to do so via the backdoor. The action did not stop the work inside the building and was mainly a symbolic protest.

Three people also climbed up onto the canopy above the main entrance and hung a banner: "Fluent Deal in Death". Other folk handed out leaflets about Fluent's involvement in the arms industry.

Several police cars arrived fairly shortly after the protest started at 9 am. The protest ended around 11.15.

Fluent later claimed that someone had switched off the air conditioning which could have damaged computer systems and that someone else had broken a glass panel on the building.