I claim no knowledge of UK politics, but did notice the charge against May was she cut 20,000 police.
Should her opponent effectively raise that charge, the poll gap might close.
It was rebutted - effectively - by pointing out her opponent has voted against every single counter terrorism bill since he was first elected to Parliament. Didn't matter who were sitting in 10 Downing St., he voted against every time.
Thankfully, we don't have the same sort of barrage of non stop TV ads and robocalls, just junk mail. Even so, there is 8 minutes of campaigning time left. All campaigning ceases at midnight, and it's one of the many restrictions that is honored.