A word of warning....
I have two separate reservations booked with Premier Inn. With both of them, the website confirmed me for one date, but when I go look in my account at bookings, the date on both has shifted to one day earlier. I don't know if it did this based on the time zone I am in, but it is really frustrating! For example, I booked for 19-22 for one stay, and the confirmation emailed to me said as much, but in the website it is listed as 18-21. I tried to amend it with one and it said it was amended (thinking maybe it was my error), but after amending it, it still shows as the wrong dates. For the other reservation, it wouldn't even let me confirm the new date (the box was greyed out). I don't see any easy way to email, chat, or call them. I am on the phone now with my phone provider to try to access international calls.