There’s no foolproof way of organising a Monday delivery. Carrier services do not collect on Saturdays or Sundays. We can send on Friday, whereupon the parcel will sit in a depot all weekend and should arrive Monday, but there’s no mechanism for a guaranteed Monday delivery. If you have to have them by Monday then I suggest you order them early in the week, aiming to get them delivered on Friday, unpack them and stand in a cool damp place, they will be fine. If you need them on a specific day please give plenty of notice and ask before ordering, we do what we can but can’t work miracles.