By independent experts. currently, a player can play a week after a failed head injury assessment if they pass return to play protocols. today the rfu have said all players in the premiership, women s premier 15s and england sides will be offered microchipped mouthguards that can help detect concussion. team england has named its squad for this summer s commonwealth games but a familiar face will be missing in birmingham, the olympic champion tom daley. matty lee, who won gold with daley in tokyo last year in the men s synchronised 10m platform event, has been named in the 18 strong squad. daley also missed the british championships last month. olmpians jack laugher and dan goodfellow are also included. the games get under way onjuly 28th. ryan giggs has resigned as wales manager with immediate effect. he stepped away from his role almost 18 months ago after being arrested. ....