It’s that time of the year again – the transfer window is now open until September 1 and it’s sure to be a busy period with clubs looking to make big signings ahead of next season. Here are today’s latest developments from Simon Jones and the Daily Mail Sport team…Clark returns to Pride ParkDerby have completed the signing of Bobby Clark from RB Salzburg.The 21-year-old, who spent last season on loan at Pride Park Stadium, has signed a four-year contract for £7m plus add ons. Liverpool also had a 17.5 per cent sell-on clause.Clark featured 45 times for Derby last season – collecting eight goals and assists – as he became a fans’ favourite and scooped the Sammy Crooks Young Player of the Season award.’It’s a big decision because I want to obviously reach my potential,’ Clark said. ‘I need to pick my next step carefully and this club definitely suits me the best – and the manager gave us the trust last season and gave me the minutes I needed to take the next step and find my form in the Championship. I think being at Derby, I’ll just get better and better. Bobby Clark was named Derby’s young player of the season after an impressive 2025-26 campaign’Since it’s been closer to getting done he’s just had really good positive conversations with us, he knows he can be the manager that helps me reach my potential and helps me grow as a player.’Lions plan on bolstering attackMillwall are in talks to sign Rodez forward Tairyk Arconte, who has also been on Celtic’s list.The 22-year-old scored 14 goals in 32 games in the French second division last season after joining Rodez from Pau FC.Championship side Millwall had made an approach for Hull City’s Kyle Joseph but he is recovering from injury still. They are determined to bring in extra pace and firepower to help take the next step up in their bid for promotion to the Premier League.Arconte can also play right wing and will cost around £2.5million. Tairyk Arconte scored 14 goals in 32 games for Rodez last season and is now a target for Championship side Millwall