D for....

What was the Milton Hilton but it's now the Marriot Bonvoy Delta or Delta Marriot Bonvoy or something - I've honestly not given it this much thought until now but I wanted to try to explain the D by the door. It could even be D for door for all I know or care.

Woke up at stupid o'clock and couldn't get back to sleep so I was making a brew before 05:00. It's no great problem, I got loads done, but I'm paying the price now. I'm going to grab some food and then crash out.