The "hybrid" regime has emerged as a promising scenario from a number of tokamak experiments [1-4]. The distinguishing feature of this regime with respect to standard H-mode is the absence of strong sawtooth activity, which is achieved by current profile optimisation. Heating was dominated in most cases by Neutral Beam Injection (NBI). Hybrid scenarios were developed at JET in 2004 with strong Ion Cyclotron Resonance Heating (ICRH) [5], which adds burning plasma physics issues like central electron heating and super-alfvénic ions. Typical parameters were BT = 3.2T, 3.8£q95£5.5, up to 10MW of ICRH at 51MHz with 4%H minority, normalized beta bN £1.5 (power limited), central temperatures Te 10keV, Ti = 6keV, central density ne 3x1019m-3. MHD studies on these experiments will be reported in this paper.