England lock Ollie Chessum will return to Leicester Tigers' starting XV on Sunday as his side host Saracens in the Gallagher Premiership.
England captain Maro Itoje will return to captain a Saracens side containing four of his international team-mates during the Guinness Six Nations when they host Harlequins in the Gallagher Premiership on Saturday.
Round six of the Gallagher Premiership promises to deliver another thrilling weekend of action, with teams looking to solidify their positions ahead of a break before the Test rugby returns in November.
Ludlow, who has captained Gloucester since 2020, has played more than 200 games for the Cherry and Whites and would expect to lead the team out against arch rivals Bath next Saturday in the Gallagher Premiership, but his fall from grace has instead left him frustrated on the sidelines.
The immediate effect switch from the Gallagher Premiership will enable the 22-year-old to go straight into the team for a start in Saturday’s fixture at Ulster.
England fly-half George Ford is set to start for Sale Sharks on Friday against Gloucester one week after facing Argentina in the World Cup bronze final at the Stade de France.
Gloucester have signed prop Mayco Vivas with immediate effect following the completion of his Rugby Championship campaign with Argentina.