Defender Winston Reid has signed a new long-term contract with West Ham which commits him until the summer of 2021.
Blackburn have signed defender Doneil Henry on a month's loan from West Ham.
Millwall will attempt to bring Tottenham hot-shot Harry Kane back to The Den next season.
Kane has made a huge impression since arriving in south London in January and scored the ninth goal of his loan spell in Saturday's 2-2 draw with Blackpool.
The 18-year-old's strike partnership with Andy Keogh played a major role in guiding the Lions clear of the relegation battle and boss Kenny Jackett will ask Spurs about his availability next term.
"We'll put in the right calls to see if we can get Harry on loan again," Jackett.