"Thank you for your enquiry. You can use your JAA class one certificate for JAA class two priviledges, until your class two certificate expires.
Kind Regards
R***** K***
Aeromedical Administration Assistant."
FFF,
above is a copy of the email the CAA sent me back. Seems it is okay to use the Class 1 expired as Class 2 until the Class 2 would expire.
Mark