Owen Farrell on Tuesday took part in his first full training session since joining the British and Irish Lions tour of Australia.
Farrell arrived down under on Friday as a replacement for broken arm victim Elliot Daly and was present as the Lions stepped up preparations for Wednesday's clash with the ACT Brumbies in Canberra.
The 33-year-old is in line to make the first appearance of his fourth Lions tour against an AUNZ Invitational XV in Adelaide on Saturday.
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Head coach Andy Farrell confirmed on Monday that his son is in contention to play in the final fixture before the first Test against Australia on July 19, having completed all his return to play protocols for concussion.
His last game was for Racing 92 against Lyon when he suffered a head injury, a further setback in a season that has been interrupted by groin surgery. He played only 17 games in the 2024-25 campaign.
"I wouldn't say he's over the jet lag just yet. I think he was up all night, but haven't we all been through that? But the rest is fine," Andy Farrell said.
Farrell's call-up is controversial given his last Test for England was almost two years ago and his only season at Racing 92 was underwhelming to the point he has agreed an immediate return to Saracens.
However, the management regards his experience and leadership as valuable assets, not least because he is the only player in the squad who was present for the last triumphant Lions tour, also to Australia in 2013.
Sexton: Great to have Farrell in the squad
Johnny Sexton, the former Ireland fly-half who is the Lions' kicking coach down under, insists Farrell has fitted in seamlessly with the tourists.
"The experience that he has, the winning mentality that he has, not to mention how good a player he is - it's great to have him in the squad," Sexton told Sky Sports News after Tuesday's training session.
"You can see immediately how excited the young No 10s were. It seems like he's got a great relationship with Finn Russell from the previous tour as well.
"So, it's been great to have him here. He's adding to the group already. He's trained very well today in his first kind of proper session with us, and we look forward to integrating him into the group over the coming weeks."
Speaking to reporters in Canberra, Sexton added: "As you'd expect with someone with that experience, he's fitted in. He's hit the ground running, so it's great to see.
"He must have had the playbook on the plane on the way over because he came in and he's not missed a beat."
"He's been on top of things in training and that's exactly why you pick someone with experience who knows about a Lions tour because it might take someone else 10 days to fit in."
Lions captain Itoje backs Farrell for England return
Speaking to media this week, Maro Itoje believes a fit Farrell could still have a role to play for England after welcoming his former captain into Lions camp.
By agreeing a return to Saracens for next season he is available for England once more - and Itoje would endorse his comeback for the national side.
"Yeah, why not? I want to see him be happy," said Itoje, who has played under Farrell with both Saracens and England.
"If he wants to play for England, why not? That would be amazing if that's in his plans and in his dreams.
"Owen is one of the best England players that we've ever seen. A fit Owen Farrell makes any team better. If that's in his ambitions, why not?"
Farrell's presence in Australia has ignited speculation that Itoje's authority as Lions captain may now be undermined, but the 30-year-old insists his former schoolmate at St George's in Harpenden will be only a positive voice.
"I've known him for donkey's years now. I have a very good relationship with him. And he just wants the squad to do well," he said.
"Sport, for me particularly, is never about ego. I want people to speak, have their voices heard and contribute in a positive way.
"It's never about me, if I'm captain, having the final say or sticking my chest out or anything like that. It's not about that.
"It's about how can we as a collective get the best result? How can we as a collective win? How can the team be successful? Because when the team is successful, first of all, you can't do it by yourself.
"And two, when the team is successful, everyone wins. Everyone has a brighter light shone on them.
"And everyone can dine on that glory for years to come. So that's all I care about. And I know Owen's the exact same. That's not an issue at all."
Highlights: Lions' tour so far
British and Irish Lions tour of Australia on Sky Sports
Sky Sports will exclusively show the 2025 British and Irish Lions tour of Australia, with all three Tests against the Wallabies and six warm-up matches to be shown exclusively live.