If you want to register for the NHS App, full information on how to do so can be found at the link below.
If you download the NHS App you will be taken through the set up requirements by the app. In most instances, this will not require you to contact your GP surgery, but you will need photo ID such as a passport or a UK driving license.
Please note that at the moment online booking of appointments is still suspended due to the COVID-19 pandemic.