Switching current accounts has become a more common occurrence recently, especially because many banks offer incentives like £250 to switch.
The current account switch service is a scheme many registered banks are subscribed to where they'll automatically switch over your details, income and outgoings to your new account, and set up your direct debits and arrange for your salary to be paid into it.
This means the switch should take no longer than seven days and is designed to make switching accounts less hassle for you, by taking away a lot of the admin.