I am with bank of Scotland.
After making a purchase, pending transactions show right away. I bought a few things for my home, and was relying on the number in my debit account to tell me how much I had spent/had left and I was checking my transactions to see if my balance accounted for the transactions. After everything spent, my debit account said I had money left over which I put back into my savings. I didn’t buy anything more after that. My electric bill was being paid the following day, so I put the money for that into my debit account.
Turns out I can’t trust the amount bank of Scotland says I have left. The following morning, my balance was £0, and I was in debt for the entire cost of my energy bill. I checked my transactions, and the money I had put in for my energy bills had been spent. If I’d of known I’d gone over, I wouldn’t have continued buying!