It has been announced that, the summer transfer window will close for Premier League clubs the day before the Premier League season starts, after a vote was taken during a meeting between the clubs. The vote did not go through unanimously though (albeit the majority vote does win).
With this ruling, Premier League clubs will not be able to sign players from other clubs after the start of the season, however foreign clubs may still sign players from the Premier League.
A statement by the Premier League said:
"Premier League clubs have today agreed to a rule amendment that will see the summer transfer window in any year end at 17.00 on the Thursday before the start of the season.
"This is for Premier League clubs only and has no bearing on other leagues and competitions.
"The first transfer window in which this applies will be the summer transfer window in 2018 (ahead of the 2018/19 season) and it will close on 17.00 on Thursday 9 August 2018.
"This new rule applies only to the acquisition of players. Clubs will still have the ability to sell players to other leagues in which the transfer window is open (as they can now to leagues that have different transfer wind dates, e.g. MLS and CSL).
"Clubs have discussed this topic at length at previous shareholders' meetings (February 2017 and June 2017) prior to today's vote."