England, Scotland and Wales have now played their last competitive matches before this summer's delayed European Championship, leaving their plans in clearer focus.
Here, the PA news agency's reporters predict each team's line-up.
England
Predicted XI: Pickford; Walker, Stones, Maguire, Chilwell; Henderson, Rice, Mount; Sterling, Foden, Kane
Having last year returned to the five-man backline that served England so well in the run to the 2018 World Cup semi-finals, Gareth Southgate has now moved to a 4-3-3 formation in a bid to shoehorn his talent most effectively into the line-up.
Jordan Pickford missed these games through injury but has been England's number one since Russia, where Kyle Walker was then among three centre-backs and currently looks likely to get the highly-competitive right-back berth.
Ben Chilwell's experience could see him pip Luke Shaw to the left-back slot, while 2018 veterans Harry Maguire and John Stones are likely to be at the heart of defence.
Luke Shaw starts for England against Albania – the #MUFC left-back's first international appearance since September 2018. Harry Kane leads the line, with Harry Maguire & John Stones lining up in central defence pic.twitter.com/eT5ECgPh2U — Simon Peach (@SimonPeach) March 28, 2021
The much-debated double pivot would surely feature experienced Liverpool skipper Jordan Henderson if he can return from groin surgery, with ever-developing Declan Rice joining him.
What happens ahead of them will be fascinating given the gamut of options, with this selection seeing the likes of Jack Grealish, Marcus Rashford and Jadon Sancho miss out.
Mason Mount has performed superbly for Southgate and Phil Foden has looked sharp, which is why they currently look most likely to join fleet-footed Raheem Sterling and skipper Harry Kane in the starting line-up.
Scotland
Predicted XI: Marshall; Hanley, Hendry, Tierney; O'Donnell, McGregor, McGinn, McTominay, Robertson; Fraser, Adams
Scotland go into their first major finals for 23 years still with some question marks over team selection.
Steve Clarke will probably start with David Marshall in goal and is likely to begin with a 3-5-2 formation. The back three will almost certainly include Grant Hanley and Kieran Tierney, with Jack Hendry, Scott McKenna and Declan Gallagher vying for the other spot.
Captain Andy Robertson is a certainty to occupy the left wing-back role while Stephen O'Donnell should get the nod over Liam Palmer on the other side of the pitch.
"KT was different class – three assists. Backing it up, helping me out, overlapping, always giving the option. People who say we can't play together maybe got proven wrong." Andy Robertson gives his assessment of tonight's victory over the Faroe Islands.#SCOFRO pic.twitter.com/IfWObkPByy — Scotland National Team (@ScotlandNT) March 31, 2021
Central midfield is where Clarke will have the most headaches. He has occasionally moved Scott McTominay into defence but he will play centre midfield, along with Callum McGregor and John McGinn – with the Aston Villa midfielder, who scored his ninth and 10th international goals against the Faroe Islands in the recent World Cup qualifier, given license to get further forward.
Ryan Jack, if fit, Kenny McLean and Stuart Armstrong are just some of the alternatives.
Ryan Fraser also has goals in him – three in his last three starts – and he might be asked to play off Che Adams, who opened his Scotland account against the Faroe Islands in his third appearance. Lyndon Dykes and Oli McBurnie are the other main central striking options.
Wales
Predicted XI: Ward; Mepham, Rodon, Davies; C Roberts, Allen, Ampadu, N Williams; Bale, James, Moore
Wales will head into the Euros with a pretty settled side – even if the managerial situation remains uncertain with Ryan Giggs still absent.
Danny Ward has taken the gloves off Wayne Hennessey after the Crystal Palace custodian's October injury, and Wales should line up with three central defenders in Chris Mepham, Joe Rodon and Ben Davies while energetic pair Connor Roberts and Neco Williams fill the wing-back slots.
Joe Allen and Ethan Ampadu would be expected to form a central midfield partnership but Allen, who ruptured his Achilles tendon last March, broke down against Belgium in World Cup qualifying last week and is now in a fitness race to make the Euros.
Massive effort from the boys tonight! Big 3 points!🔥🏴 #WCQ @Cymru pic.twitter.com/yakU7vAz0X — Gareth Bale (@GarethBale11) March 30, 2021
Juventus playmaker Aaron Ramsey is a shoo-in if fit, but the problem is that he rarely is. Ramsey has started only three of Wales' last 23 games.
Skipper Gareth Bale and Daniel James add attacking pace and penetration on either side. Harry Wilson and Kieffer Moore have competed for the central forward role, with caretaker boss Robert Page describing it as a "horses for courses" call.
