Wasps sign Gloucester's Paul Doran-Jones and fellow prop David Langley from Cambridge, while Tom Bristow exits the club.
Uncapped trio Steff Evans, Seb Davies and Thomas Young are named in the Wales team to face Tonga in Auckland on Friday.
Wasps' Tommy Taylor and Worcester Warriors' Nick Schonert are ruled out of England's tour of Argentina through injury.
Wasps sign South Africa international centre Juan De Jongh from Super Rugby side Stormers.
Audio & Video
The moment the England and Wasps fly-half Danny Cipriani had to put an interview on hold after he was approached for a photo by a fan.
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