By Toby Cudworth There could be a real hive of summer transfer activity at West Ham United as they look to build out the squad of new head coach Julen Lopetegui. The Spaniard has jumped into the shoes of David Moyes at London Stadium, tasked with not only reinforcing the club’s status as a top-half Premier League club but also to bring a modern style and sophistication to the style of play on offer. Doing so will require a turnover of personnel, both in and out, as West Ham look to reshape and expand what was already a pretty threadbare squad prior to the summer exits of Angelo Ogbonna, Ben Jo…