Let fnew be a classical newform of weight ≥2 and prime to p level. We study the arithmetic its unique p-stabilisation f when is p-irregular, that is, Hecke polynomial at admits single repeated root. In particular, we p-adic families through base-change an imaginary quadratic field F where splits, prove respective eigencurves are both Gorenstein f. use this construct two-variable L-function over...