A new wave of redundancies has reduced Sony's games developer workforce in the UK, with layoffs confirmed at three studios.
The corporation has commenced a restructuring operation at DriveClub developer Evolution Studios, as well as Sony London Studio and Killzone: Mercenary developer Guerrilla Cambridge.
LittleBigPlanet and Tearaway developer Media Molecule appears to be directly unaffected by the procedure.
In a statement issued to CVG, a Sony representative said "regular reviews take place throughout SCE Worldwide Studios, ensuring that the resources that we have in such a competitive business can create and produce high quality, innovative and commercially viable projects".
The message continued: "As part of this process, we have reviewed and assessed all current projects and have decided to make some changes to some of our European Studios.
"As a result of this, there will be a focused restructure within London Studio, Guerrilla Cambridge Studio and Evolution Studio to ensure that the Sony Worldwide Studios is in the best position to achieve their goals going forward.
"Our first party development studios are key to our creative strategy and we are very excited about the future projects being worked on."
Sony announced in October that Evolution Studios' DriveClub project, which was originally planned to ship along with the PS4 in November, was delayed until further notice.
In January, it was teased that the new DriveClub release date would be announced "shortly", though the announcement never came to pass.
Then in March, a Sony representative claimed that the studio "went back to the drawing board" with the project, suggesting the delay was enacted to make fundamental changes.
Despite the success of the PlayStation 4 - with more than six million units sold, more than 14 million games sold and at least half its customer base subscribing to PS Plus - parent company Sony has spent the past several years trying to regain profitability by shrinking its cost base.
As part of that plan, the Tokyo headquartered company recently announced it was planning to cut 5000 jobs.
Key developers and executives have departed amid layoffs at US studios such as Sony Santa Monica.
In August 2012, the PlayStation business closed its Sony Liverpool studio.