Please post your sample between Monday to Thursday, and on the same day that you collect your blood sample.

Remember to post your sample before the last post is collected by Royal Mail, this will reduce the time that your sample will sit in the post box. Visit Royal Mail’s services near you page to find your nearest postbox and collection times by clicking here. 

We have a top tip for you: Record the tracking number on the front of your postal envelope so you can track your sample. We'll notify you once your sample arrives at our lab.