After complaining about squad numbers in the aftermath of Blackburn Rovers' defeat to Nottingham Forest, Tony Mowbray's prayers have been answered with seven first-team players who missed Saturday's encounter training with the squad ahead of a trip to Watford.

Derrick Williams, Lewis Holtby, Joe Rothwell and Joe Rankin-Costello were all absent from Saturday's fixture while new signings Harvey Elliott, Tom Trybull, Aynsley Pears and Barry Douglas were not involved in the matchday squad.

The new boys joined in with training on Monday and are back in again today as Mowbray assesses whether they're capable of playing a part on Wednesday, while Rovers have been further boosted by the returns of Holtby, Williams and Rankin-Costello.

Rothwell is into his fourth day of self-isolation but Mowbray insisted the 25-year-old is keeping well during his quarantine period.

As for options for Wednesday, Mowbray is understandably cautious on including the new signings but with numbers back on his squad board once more, it's a welcome relief for the Rovers boss as his side prepare to challenge a chaotic fixture schedule.

“Derrick Williams is back from Ireland today, on the grass, he’s been isolating so we’ll have to assess him," Mowbray said in his pre-match press conference.

“I’m not sure whether he’ll be ready, we’ll wait and see after training.

“He was in my office this morning, it’s his first day back, his last day of quarantine was yesterday, but we’ll have to get him with his boots on, some air in his lungs again, get him moving and kicking a football.

“Harvey Elliott, he’s trained yesterday, his talent is there for us all to see. He’s a nice kid.

“How much work they (Douglas and Trybull) have done, how many games they’ve played, I have to try and manage them into our set-up.

“I can see their qualities, but it’s not as simple as bring them in and two days later throw them straight into the team. It doesn’t quite work like that.

“Footballers have to be fit, every club this day works ever meterage during the week on how much ground they’ve covered in the games, in training, and Tom is someone who has to build up his metres.

“But like Harvey you can see on the training ground that he brings a lot of quality, a lot of good decision making, the quality of his passing is a really standard and we’re looking forward to integrating them as the weeks roll on.”

Rankin-Costello sustained a hamstring injury during the victory over Derby County in September and the versatile midfielder has been nursing has been cautious during his rehabilitation in a bid to reduce the risk of aggravating the issue.

The 20-year-old has proven himself to be an established member of the first-team but Mowbray is wary that Rovers may need to use him sparingly in order to prolong his fitness.

"Rankin-Costello has been out for three-and-a-half weeks, I haven’t seen him on the grass really," Mowbray told Rich Sharpe.

“Those are the calls I have to make. He’s coming back from an injury. Do you throw him straight in to a high intensity game away from home at Watford? We could do with him to be fair.

“He played in 5-0 and 4-0 and was very integral in them, but we have to cautious.

“He’s a young lad who’s coming from Under-23s football and now being exposed to the intensity of playing in the Championship every three days, I think his body has found that difficult.

“Ultimately he’s broken down a few times for us. He needs managing I would suggest, but he’s very much part of the training today and moving forward. It’s great to him back with the versatility he brings.”

As for Holtby, the midfielder returned to England on Sunday evening after spending several days back in Germany to attend the birth of his newborn daughter.

It was a decision that Mowbray urged him to take, but the Rovers boss is delighted to have him back regardless.

“Lewis Holtby has never been injured, his was really a decision I made for Lewis and his family who are in Germany.

“She chose to have her child in Germany, surrounded by her family, and I thought it was the right thing to let Lewis go there.

“It was a difficult process she went there and I allowed to be around his wife, his newborn child and his family and I think, for me, it was the right thing to do.

“It was disappointing that we lost at the weekend without him but moving forward I think Lewis will give us back in spades with the work ethic and talent that he brings.

“We’re looking forward to having him back, he’s back working, training, he is enthusiastic as ever and we’re looking forward to having him back.”