Unauthorized Overdraft -No Charges

[tali1]

I went into unauthorized overdraft for the first time on my santander 123 account - but wasn't charged anything.(they emailed me to confirm this)
I thought going into unauthorized overdraft always incurred a penalty ?

[ABerrant]

Lloyds Banking Group scrapped unarranged overdraft fees and monthly usage fees in November 2017, affecting Lloyds Bank, Bank of Scotland and Halifax accounts.

Santander followed Lloyds and removed unarranged overdraft charges from 10 July 2018 on all of its on fee-charging accounts. This includes the 123 Current Account, 123 Lite Current Account, Select and Private accounts. However, the bank’s free accounts - Everyday, Student and Graduate - are still subject to unarranged overdraft fees of up to £6 per day, capped at £50