This is no longer an art centre. It's part of the Canada Water Masterplan and it will soon be demolished giving space to a new residential building. It's already surrounded by fences. 

You can check the Masterplan in this document - https://bl-web-assets.s3-eu-west-1.amazonaws.com/live/canadawater/s3fs-public/downloads/design_and_access_statement_volume_vi_plot_k1.pdf?V54wQ8ct5EtC6_0lxOkQMwvW9T1Ofj51. Quote from page 44:
MasterplanThe Canada Water Masterplan comprises the Surrey Quays Shopping Centre, former Harmsworth Quays Printworks and Surrey Quays Leisure Park sites, former Dock Offices Courtyard, former Rotherhithe Police Station and the site at Roberts Close. The masterplan will see the heart of the former Surrey Commercial Docks revitalised, to create a vibrant, inclusive, mixed-use urban centre.

The document I found here - https://www.canadawatermasterplan.com/the-application. 