Bank staff may not work on Sundays (they do open on Saturdays, certainly in the morning) but the systems work. I did a faster payments on Saturday to someone (different bank) and she received the money in her account within 10 minutes. I even got a text in between asking me to confirm my payment was genuine. But I suspect the money won't show as cleared until today (Monday). So I'm not sure why the payments can't go clear on the same day as no manual intervention is needed as far as I can see. It's not a problem for me but I'm just curious as to why payments can't go out at weekends