1 savings account.
Opening an account is your decision.
From The AA’s page
After 12 months, the bonus rate will end and only the standard variable rate will apply.
Once your bonus rate expires, you won't be able to renew it.
Payments in and out of your savings account can only be made to and from your nominated account.
You can only have one Easy Access Savings account and it needs to be in your name.
You can only withdraw up to £10,000 from your account each transaction, and £20,000 over a rolling 24 hour period.
Opening an account is your decision.