Pizza chain Papa Johns has revealed plans to close about 50 takeaways in the UK which it said are not performing as well as others. Kent is home to 24 branches of the US-based company and it is not yet known how many of them could be at risk of shutting down. The stores are scattered across the county and are based in places such as Herne Bay, Medway, Folkestone and Ashford. But which of the sites are set to close has not been made public. Papa Johns has more than 450 restaurants across the UK and the move comes as part of efforts to bolster its performance in the country. A spokeswoman for th…