I noted on Zvi's recent post (found here https://www.lesswrong.com/posts/gbuXXC9KvphmXQFLd/what-evidence-will-tell-us-about-the-new-strain-how-are-you#GxzkzNdYfTLjmQEAm ) that Denmark was one of few other nations to do large amounts of Covid strain sequencing.
This is a followup with the newly released data.
The data seems consistent with a doubling time around a week.
Here is a graph over cases which where tested on specific days, note that days where there where 0 tests sequenced as B.1.1.7 have been skipped
(colors corespond to different areas in Denmark)