A new edition has been published, the details can be seen here:
JCT 05: Prime Cost Building Contract (Revision 1 2007) isbn 9780418850305

JCT 05: Prime Cost Building Contract

Subjects:
Construction Law

ISBN13: 9780418829202
ISBN: 0418829209
New Edition ISBN: 9780418850305
Published: October 2006
Publisher: Sweet & Maxwell
Country of Publication: UK
Binding: Paperback
Price: £41.07

The Price is 34.95 and VAT of 6.12