As I was reading through the forum, I thought i’d give my 2 cents worth.
Salaries are usually always paid using the BACS payment system which takes 3 working days to clear, and its 3 working days are only Monday to Friday as Saturday is not considered a banking day. FP is instant (nearly) which some smaller companies opt to use instead of BACS. Either method your company chooses to pay you it should be adhered to the same at Mondo as any other bank. As you said it appears on the Saturday I would expect your company to be using the Faster Payment scheme to pay you.