Hi
If the PCC you submitted was issued more than a year ago and if it is not too impossible to get new ones, I recommend you just get new ones (for your current country of residence) and send to them along with updated Schedule 1 forms for yourself and any dependents over 18 years of age.
That way, you eliminate the chance of being asked for new ones when your background/security checks are over.
Hope this helps.
// O