From the CAA website:
Temporary Certificates (TCs) are valid only for UK CAA Part-FCL (or JAR FCL) licence holders and SFEs whose Competent Authority is the UK CAA. TCs are not available for initial issue of licences and are not available to anyone whose licence or certificate is subject to any UK CAA licensing action,
Then we go to the SRG1100 and find this:
SRG1100D: Temporary Licence Certificate for FRTOL Examiner Privileges
Which of course is a Certificate subject to UK licensing action and according to the above statement doesn't qualify. When asked to explain this anomally, the CAA didn't understand the question.