Hello & Welcome to JustAnswer. I'm Kamil and i will do my best to assist you.
Can you tell me the part after the @ sign of your e-mail address?
Okay. Can you tap settings -> mails, contacts & Calendars
From Account, choose your Yahoo.co.uk account
Then tap Delete at the bottom.
Let me know when done.
Now tap Settings -> Mails, Contacts & Calendars again
Then tell me what do you see under Accounts?
Just the iCloud?
Okay. Tap the round button on the iPad
Then tap the Mail icon and tell me if you still get the error
Yes, please check if you still the error message.
get the error message*
Okay. Now tap Settings -> Mails, Contacts & Calendars
Tap Add Account
Provide the Name, Email, Password, Description.
Tap Next, and follow instructions on screen.
Once the account is readded, check again.
The account description, such as Yahoo
Did they hack into your e-mail?
The best way is to keep a secure password, not based on a dictionary word and keeping the iPad updated with latest Apple's software.