I believe the alpha 1 test can be done via the post with a spot of blood via the Queen Elizabeth University Hospital, Birmingham. As far as I'm aware it's free for the patient.
See below for the details and the link...
Family testing for alpha-1 antitrypsin deficiency (AATD)
Since alpha-1 antitrypsin deficiency (AATD) is inherited it is important that family members of patients with AATD have access to genetic testing. We are able to offer this service using a fingerprick blood test, and can send the materials to do this through the post to you/your patient.
If you would like access to this service please email us with your details, and those of your GP. It is also useful if you can tell us if you have any diagnosed family members already, and if they are known to our service.
If you are a healthcare professional, please tell us when you request a kit if you would wish us to follow-up with offer of an appointment to our clinic to your patient should the test be abnormal.