The GEANT TF-NGN group meets four times a year to discuss trials and studies of novel and leading edge network technologies for the GEANT pan-European academic research network. ECS has leadership of the IPv6 Working Group, which includes deployment of a mini-backbone comprising a Juniper M5 router in Paris, a Telebit router in Amsterdam and, soon, a Hitachi GR2000 router in Southampton. The group covers activities complementary to those of 6NET.