“May flew overnight as a replacement for George Lowe (Harlequins) who will return home tonight for further consultation after a scan showed left ankle ligament damage.” the statement said.
Lowe was injured during the midweek game against the Southern Barbarians in Kimberley after his foot was trapped in an awkward position by a tackle.
The 22-year-old May is uncapped by England.
“It’s a shame for George because he had a good game against the Southern Barbarians until he was injured. But this is an opportunity for another young player who has come up through our age-grade programme and into the Saxons to gain some valuable international tour experience,” England head coach Stuart Lancaster said.