ADELAIDE - Surrey seamer Tom Curran was added to England's Ashes squad on Tuesday after Steven Finn was ruled out of the tour of Australia with a knee injury. Finn, himself a late replacement for the absent Ben Stokes, has been diagnosed with a torn cartilage in his left knee and will head back to England for a possible operation.

Curran, 22, was next in line and the England and Wales Cricket Board has announced he will fly to Australia on Wednesday. A son of the late Zimbabwe all-rounder Kevin Curran, Tom has played a single one-day international and three Twenty20 internationals but is yet to make his Test debut.

He took 24 wickets at 34.66 for Surrey in the First Division of the County Championship last season, while averaging a useful 27.44 with the bat. His selection has seen Curran chosen ahead of two more experienced pace bowlers in Liam Plunkett and Mark Wood. Finn only made the current tour when he was added to the squad in place of the suspended Stokes, whose involvement remains in the balance as the ECB conduct an internal disciplinary inquiry and await the outcome of a police probe into his involvement in a brawl outside a Bristol nightclub on September 25.

Tuesday's announcement ended another miserable tour of Australia for Finn, who suffered his injury when, after batting in the nets in Perth ahead of the first warm-up match, he hit himself while batting in the nets. The Middlesex quick was dropped midway through England's victorious Ashes campaign of 2010/11 and left the previous 2013/14 trip under a cloud when then limited-overs coach Ashley Giles declared him "un-selectable".

England coach Trevor Bayliss told reporters in Adelaide on Tuesday: "He (Finn) had an injection a couple of days ago which they thought would help." But the ECB statement confirming Finn was out of the tour said he would "return to the UK in the next 48 hours where he will meet a knee specialist to ascertain whether he will have an operation". The first Test between England and Australia starts at Brisbane on November 23.

Meanwhile, Injured Moeen Ali will also be unavailable for England's second tour game in Adelaide, coach Trevor Bayliss said Tuesday, missing the chance to prepare for the day-night Ashes Test in the city.

Bayliss said all-rounder Ali (side strain) and fast bowler Finn (knee), who also missed England's drawn opening tour game in Perth, will sit out the four-dayer under lights against a Cricket Australia XI, starting on Wednesday.

"Mo Ali is more precautionary now, we will just leave him out of this one and make sure he's right."

Bayliss also said he was uncertain over one batting spot and another fast bowling option for the first Test starting in Brisbane on November 23. "We have probably got a batting spot to finalise and probably a fourth pace position so there's a little bit of competition from within which is good," Bayliss said.

England have one further four-day warm-up game in Townsville from November 15 before the first Test. Bayliss said the team was focused on becoming familiar with the day-night conditions and playing with a pink ball ahead of the second Test at Adelaide Oval.

England have only played one day-night Test, which they lost to the West Indies last August. "We have got this (Adelaide) game to see what happens with the pink ball and for our guys to experience it with a view obviously to that (day-night) second Test," Bayliss said. "If the ball moves around a little bit more, that is what we like to see more of.

"Our batters are more used to playing on wickets that do a bit more sideways and obviously the bowlers bowling on it as well, moreso than the Australian guys."

Former Test fast bowler Ryan Harris, coach of the CA XI team, said he wants to send the tourists to Brisbane low on confidence and with as little insight as possible into batting against the pink ball. "I know going into these sort of tours your warm-up games can set the tone for the tour, you don't want to lose. Our job is to make it as tough as we can," Harris said.

Harris said he wants to reduce batting opportunities for England during the twilight period that has proven prohibitive for batsmen. "We are not here to make it easy for England," Harris said.

"When it gets to dusk the grass almost seems to sit up and it zips around. It can be tough to bat around that time.

 That is where we will make it as hard as we can for England. Hopefully they are not batting around that time, that is my plan."