Finding out diversion routes in advance oops posted twice

Can anyone point me in the right direction to find out diversion routes in advance for planned night closures.
I’m sure when I was on nights before I found them on the highways agency website, but I’ve been on there and it shows the roads that are closed but I can’t seem to find the diversion routes on there.
Do they still do it or am I looking in the wrong places.
Any help would be appreciated