The Patient Advice and Liaison Service (PALS) offers confidential advice, support and information on health-related matters. They provide a point of contact for patients, their families and their carers.
Regarding certificates or evidence about your COVID vaccination status GPs cannot issue a certificate to demonstrate your vaccination status. Please see https://www.gov.uk/guidance/demonstrating-your-covid-19-vaccination-status-when-travelling-abroad for further information. Proof of your vaccination status will be available in the NHS app from 17th May 2021, and in some of the other apps that provide you with Patient online services.