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Nova V458 Vul erupted on 2007 August 8th and reached a visual magnitude of8.1 a few days later. H$\alpha$ images obtained six weeks before the outburstas part of the IPHAS galactic plane survey reveal an 18th magnitude progenitorsurrounded by an extended nebula. Subsequent images and spectroscopy of thenebula reveal an inner nebular knot increasing rapidly in brightness due toflash ionization by the nova event. We derive a distance of 13 kpc based onlight travel time considerations, which is supported by two other distanceestimation methods. The nebula has an ionized mass of 0.2 M$_{\odot}$ and a lowexpansion velocity: this rules it out as ejecta from a previous nova eruption,and is consistent with it being a ~14,000 year old planetary nebula, probablythe product of a prior common envelope (CE) phase of evolution of the binarysystem. The large derived distance means that the mass of the erupting WDcomponent of the binary is high. We identify two possible evolutionaryscenarios, in at least one of which the system is massive enough to produce aType Ia supernova on merging.

A planetary nebula around nova V458 Vul undergoing flash ionization