A 12 cert at 6.30pm? They'll cut it. CH4 cut The Search For Spock a while back during the afternoon and that's a PG.
ITV will probably put The Dark Knight on starting at 9pm and stick the 45 min long 10pm news in the middle of it.
Not that I thought anything of The Dark Knight, but thank God for downloads for the bigger films.
Film4 showed titanic at 8pm and they should Kate Windswept semi nude.