I clicked on a link about my bank account and entered my bank details before closing it down The bank says there are no unusual transactions on my account but I'm worried there ia a virus on my phone now - how can i check?

There is no virus on your iPhone. The chances of the iPhone getting a virus are extremely unlikely due to the infrastructure that Apple has built. If you have not Jailbroken your iPhone then your chances of getting a virus are next to zero.

You clicked on a link that was probably fake and entered your bank account credentials. Did you press ENTER and submit the credentials or did you simply fill in and then just closed the page? If you hit RETURN or LOGIN then change the Password to that bank account. If you just closed the page without hitting ENTER or LOGIN etc. then the entries were not recorded by scam website and you should be fine. You can still change your bank account password to be on the safe side. To be on the safest side, you can change all your account information with the assistance of your bank.

Axel F.