I said it would be interesting to see who reacted how to the M20 plans. So far there is no comment here from the Brexit supporters (a link to the official statement is indeed welcome, but is not a comment upon it.)

In the media, both the Express and the Mail have described it as a consequence of Brexit.
The Guardian, naturally does so as well. My original post was from the BBC and also made the Brexit link, but I have not found a fuller article there or on the Independent.