English: I, Adrian Jones, am the author of this image of HMS Gleaner. This image was taken at HMNB Portsmouth at the IFOS 2005 on Saturday July 2nd 2005. I give permission for this image to be released to public domain and used freely. This and other images may be found on my site at http://www.uss-sheffield.co.uk/royalnavy.html

According to the upload:

HMNB Portsmouth did allow permission for photography during the International Festival Of the Sea (IFOR) celebrations. All precautions were taken to ensure no classified or secret areas were photographed