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The universal galaxy cluster pressure profile from a representative sample of nearby systems (REXCESS) and the<i>Y</i><sub>SZ</sub>โ<i>M</i><sub>500</sub>relation
(abridged) We investigate the regularity of cluster pressure profiles with REXCESS, a representative sample of 33 local clusters observed with XMM-Newton. The sample spans a mass range of 10^14 M_sun <M_500<10^15 M_sun. We derive an average profile from observations scaled by mass and z according to the standard self-similar model, โฆ