Sameday = Same Day
Special Delivery™ 9.00am = 1 day
Special Delivery™ Next Day = 1 day
First Class = 1-2 days
Second Class = 3+ days
Standard Parcels = 3+ days
Royal Mail Heavyweight = 7 days
not for priority mail so much except for the simple fact it won't be delivered if you send it 2 days before a holiday, as that holiday would have been the day it normally would have been received,...