hubieran preferido
Past perfect subjunctive ellos/ellas/ustedes conjugation of preferir.

preferir

Aunque se queda corto respecto de la cobertura del 100 % que sé hubieran preferido algunas Señorías, pienso que ofrece un compromiso realista, dadas las restricciones técnicas y económicas a que está sometido el sector.
While this falls short of the 100% coverage which I know some colleagues would have preferred, I think it offers a realistic compromise given the technical and economic constraints that the industry is under.
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