By Jon Robinson More than 40 “underperforming” UK restaurants are to be closed by pizza chain Papa Johns, it has been confirmed. The takeaway business confirmed plans to axe 43 locations after launching a review at the start of the year. Papa Johns International said it will close the restaurants by mid-May following a consultation process while the company has not confirmed how many staff will be impacted by closures. The group had previously said it planned “strategic closures” in order to free up money for investment and improve profitability at its remaining UK sites. It has now identified…