That's it for our coverage today.
We had four centuries from Chris Nash, Adam Lyth, Jonny Bairstow and Sam Robson, with the last two unbeaten and ready to continue their innings on day two.
There were also six-wicket hauls for Neil Wagner and Clint McKay, the former achieving the best Championship debut figures for Lancashire since 1924.
All the matches are intriguingly poised and we'll be back on Monday from 10:45 BST.
Have a good evening.