The CAA guidelines are quite clear as to whether or not the instructor should sign of the training flight.
"If the pilot is not up to the expected standard then the log book should not be signed but annotated as "requiring further training". What further training is required has to be agreed between the student and instructor."
Basically the log book can only be signed if the instructor considers the student/pilot to be of a satisfactory standard i.e. safe to continue flying.
Last edited by jgs43; 24th June 2008 at 05:18.
Reason: spelling error