Don't phone the SATCO. It will only irritate him with something that is of little concern.
Phone OPS, PPR & book in, get briefed of anything relevant air-wise & don't forget to check availability of AVGAS if required and what sort of ID you need. You may need to provide a pax list too.
Insurance requirements are changing at present so I would ask OPS exactly what they need from you - you may need to provide them with a copy of your certificate before flying in.
ap