GV - had you asked this question of an Examiner prior to that date of expiry of your SEP Class Rating, the answer would have been 'Yes'. However, now that it gone past that date and your rating has expired, you must indeed fly a renewal check flight; this is a SEP (Land) Class Rating Renewal Proficiency Check which you must fly with an Examiner. No fee to pay to the CAA, just whatever the Examiner charges (plus ac hire, of course!). You will be able to use your SEP Class Rating privileges again immediately after the Examiner has signed off the LPC SPA and has signed your FCL150CJAR form in your licence.