As you have UK PPL and the rating is in the licence the Examiner can sign the rating on completion of the Proficiency Check and you are good to go. You can still use your UK licence on an EASA aircraft with LAPL privileges until April 2018. The examiner will send a SRG1157 to the CAA. You then have until April 2018 to send SRG1104 to the CAA to obtain an EASA licence.