If you put them down in that order,
they will be looking for vacancies at ozzy bay 1st, small centre, fewer jobs.
Boreatton Park, you shouldn't have a problem getting a job there, super huge centre, but PGL prefer to allocate people to their 1st choice centres.
Fosca is also small, so may be more difficult.
Getting in touch with them doesn't speed things up. My guess is they may still be allocating jobs to returners since they get priority. If your referees have being received by PGL, then they are just waiting for a place to allocate you to. I'll give it till beginning of december before getting in touch.
By the way, what job have you applied for, and when did you send your application in?