Have you already registered?   
It is not possible to apply online for a joint account. You can download the application form here. ISAs can only be held in a sole name.

Applying online is straightforward - it should take less than 10 minutes to complete. You'll need your National Insurance or taxpayer identification number and bank details to hand.

You must provide details of a UK bank account in your name for us to activate your account.

If we are able to agree your application straightaway, you can use a debit card to fund your account and start trading immediately. If we cannot complete your application, we will tell you what additional information we need from you.

What type of account do you want to apply for?
Investment Account ISA
Equiniti Shareview Dealing
Where did you hear about Shareview Dealing?