Manu Tuilagi and Henry Slade are winning their fitness battles as England aim to build momentum in their Guinness Six Nations title quest.

The outside centres have been recovering from respective groin and ankle injuries and are on course to be available for Sunday’s pivotal clash with Ireland at Twickenham.

Tuilagi suffered a minor strain in the opening quarter against France in round one and sat out the Calcutta Cup victory over Scotland, with Jonathan Joseph deputising in his absence.

Slade, meanwhile, has not appeared since damaging his ankle in December but was involved in Wednesday morning’s training session at England’s Surrey training base.

In an indication that the duo are close to making their comebacks, they were retained in a reduced 27-man training squad after six players were dispatched back to their clubs for the weekend’s Gallagher Premiership action.

Sufficient cover has been retained in case either suffers an injury setback over the coming days with Eddie Jones set to name his team on Friday morning.

Head coach Eddie Jones said: “Manu trained fully so should be in contention for selection. It’s good to have a quality player back.

“Slade also trained so we have just got to monitor his progress. He has a positive chance. He’s a quality player. This gives gives us more options.”

The return of two key midfield personnel has come at a welcome time for England after Ollie Devoto became a doubt for the visit of Andy Farrell’s men to Twickenham because of a back issue.

Tuilagi’s ability to power over the gainline will be especially important against Ireland as Mako Vunipola – another explosive carrier – will miss the clash for family reasons.

Vunipola is returning home, joining his younger brother Billy on the list of absentees with the marauding number eight ruled out for the entire Six Nations because of a broken arm.

In Mako’s absence, Joe Marler and Ellis Genge will fill in as starting and replacement loosehead props.

“Mako’s a quality player but we are lucky we are blessed with two outstanding loosehead props in Joe and Ellis, so we can recover the loss of Mako. But it’s disappointing to lose him,” Jones said.

Mako Vunipola will not play for the rest of the tournament
Mako Vunipola will not play (Steven Paston/PA)

The scrummaging technique of Ireland prop Tadhg Furlong has been called into question by Wales in the wake of their 24-14 defeat in Dublin and Jones has revealed that England will talk to referee Jaco Peyper in advance of Sunday’s collision.

“The scrum is the place for the dark arts. What one person sees as right, another person sees as wrong,” Jones said.

“The Welsh are entitled to their opinion. We’ll formulate ours and let the referee decide on the verdict.

“Ireland are a good side, extremely well coached and we really respect them. They were well coached by Joe Schmidt and Andy is doing a great job now.

“Ireland are our next game so it’s our most important. We are on track.”