My response from Chris Makin (airfield owner) when I enquired was as follows:
"No ppr , standard joining procedure"
There is a NOTAM stating:
REMAIN CLEAR OF SHERBURN ATZ
ROUTE TO CHURCH FENTON VIA ONE OF:
WETHERBY RACE COURSE
GARFORTH MOTORWAY INTERCHANGE
SELBY
Call 07450 461045 for more info