New door, new floor - which first?

We're getting a new external back door in the kitchen and a new floor (solid or semi solid).

Which should we get installed first - does it make a difference, re levels or anything else?

Got all my floors and doors changed in 1 go. The guy who did it did the doors first and left the required gaps under the frames for the flooring. Threw down some levelling compound first( get someone to do it if you haven't done it before - knew a guy who put down enough for a second foundation because he got carried away). Popped skirting on last.

Made sense as well I suppose as you could easily damage the flooring putting the doors in.