Even the 9 years he got in 1998 was lenient. I think the courts would deal with any new convictions much more severly.
Glitter was convicted of attempted rape, four counts of indecent assault, and one of having sex with a girl under the age of 13 and got 16 years.
Maybe more comparable is Chris Denning - 21 sex offences between 1969 and 1986, against 11 boys, the youngest of whom was eight. He got 13 years.