May, 19, has spent the last four weeks at Griffin Park and scored on his debut for the west London club.
Elsewhere, non-league Farnborough Town have made two attempts to get defender Mark Phillips on a temporary contract and have also expressed an interest in Welsh u-21 centre half Matt Rees.
Finally, Millwall's 19-year-old goalkeeper Dave McCartney has today joined Ryman League outfit Egham Town on a month's loan in a bid to gain some valuable senior experience.