Recent research on Advanced Tokamak in JET has focused on scenarii with both monotonic and reversed shear q profiles having plasma parameters as relevant as possible for extrapolation to ITER. Wide ITBs, R~3.7m, are formed at ITER relevant triangularity d ~ 0.45, with ne/nG ~ 60% and ELMs moderated by Ne injection. At higher current (IP 3.5MA,d ~ 0.25) wide ITBs sitting at R 3.5m (positive shear region) have been developed, generally MHD events terminate these barrier otherwise limited in strength by power availability.