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We introduce a new class of inhomogeneous cosmological models as solutions tothe Einstein-Maxwell equations in electrovacuum. The new models can beconsidered to be nonlinear perturbations, through an electromagnetic field, ofthe previously studied `smooth Gowdy-symmetric generalised Taub-NUT solutions'in vacuum. Utilising methods from soliton theory, we analyse the effects of theMaxwell field on global properties of the solutions. In particular, we showexistence of regular Cauchy horizons, and we investigate special singular casesin which curvature singularities form.

Smooth Gowdy-symmetric generalised Taub-NUT solutions in Einstein-Maxwell theory