There are two options which can be used:
1. Log into your account via the My Account link, and select the My Orders area from the menu on the left side. Once in this area, you can see the status of your orders at a glance.
2. You can access this page https://shop.photomart.co.uk/sales/guest/form ( it works only if you are not logged in ) and enter the required details: Order ID, Billing Last Name and pick an option on how to find Order By.
Photomart also sends automatic order status updates via email, once an order status has been updated.