A marriage between Vodafone and cable group Liberty Global has been reportedly on the cards for years, but in the MNO’s home UK market, it may have found another option for improving its access to all-important fibre – a tie-up with Openreach, the wholesale arm of incumbent telco BT. Mobile-only operators round Europe are seeking fiber partnerships so they can participate in one of the region’s few areas of consumer growth – quad play bundling. It has been assumed for years that this trend would finally drive Vodafone to agree a merger or joint venture with Liberty, which runs cable operations in several key European markets including the UK (it owns Virgin Media). So far, despite many rounds of talks…