HI Nick,I think if your appt was going to arrive within th 4 weeks it would have by then. it may be worth a phone call to the appointments manager to see if you ahve an appointment. After all, your PT can't see whether your appointment is pending or not and he'll only know about it when you tell him about it yourself.Sometimes these appointments can take longer if they're considered an in-house referral. Makes ure first that this isn't the case with you otherwise you could end up waiting a whole lot longer than a month.
Keep on top of those appointments 'cos they'll disappear, not turn up or run away with you if you allow it. Keep callin gyour PT and OS's secretary to find out what's going on.