Maddison, G., Giroud, C., Beurskens, M., Devynck, P., Eich, T., Jachmich, S., et al. (2013). Contrasting H-mode behaviour with fuelling and nitrogen seeding in the all-carbon and metallic versions of JET. Talk presented at 40th EPS Conference on Plasma Physics. Espoo. 2013-07-01 - 2013-07-05.