Question: PREVENT - filtering "Home Office" sites

Hi
I am interested to know how other HE/FE or any other institutions are implementing the PREVENT filtering. I have been asked by our safeguarding team to produce reports on keywords searched and to block access to 'radical etc' websites. After some investigations I have found out about the Home Office list that ISP (BT, VM etc) use. We use Janet as our ISP and have been told that Janet do not apply the filter list to our internet feed. I am checking with our web filter provider (Fortiguard) to see if they do. So just wondering what other sites are doing?

Thanks for any info.

Ian Harrison