Some models for the suppression of turbulence in the L to Htransition, suggest that the width of the H-mode edge barrieris either proportional or is of the order of the thermal or thefast-ion poloidal Larmor radius. This would require that thewidth of the edge barrier should depend on the plasma current.This dependence has been clearly verified at JET in experimentsdesigned to control the edge MHD stability of ELM-free hot-ionH-mode plasmas. The effects of isotopic mass and theapplicability of several edge barrier models to the hot-ionH-mode plasmas were analysed in (Guo H Y et al 2000 Edgetransport barrier in JET hot-ion H-modes Nucl. Fusion40 69) using a large database containing both deuterium-onlyand deuterium-tritium plasmas. This database has nowbeen enlarged to include discharges from a plasma shape scan,allowing one to study the dependence of the pedestal height onthe edge shear. In addition, the range of plasma currents wasextended up to 6 MA. It is shown that the edge data are bestdescribed by a model where the edge barrier width is determinedby the fast ions weighted towards the components with largestpoloidal Larmor radii. However, it is not possible toconclusively eliminate the thermal ion model.