AFAIK, Sun Express will also operate to MAN in S2021
Info from
Sean M @SeanM1997 twitter who seems to be a reliable source
Sun Express - Antalya to Manchester. Flights start 26 March 2021
XQ594 AYT 1425-1725 MAN (Mon & Fri)
XQ595 MAN 1820-0055+1 AYT (Mon & Fri)
Wednesday and Sunday flights added from 30 May 2021