Bipolar sufferers unfortunately spend more time accessing healthcare appointments than 'normal' people due to the amount of medications and blood tests required.
Try the NHS app if you want to book a GP appointment, do repeat prescriptions, see upcoming and past appointments, view messages from your GP and nurses, stay up to date with your COVID19 vaccinations and find services near you.
If you're wondering whether the site is secure, it uses 2 factor authentication, it logs out after 5 mins of inactivity and it allows you to sign in with your Face ID. You also need photo ID in order to access the app.
This NHS app might be useful if you can't get out and it helps you stay on track with your appointments, blood tests etc.