England manager Gareth Southgate says Tammy Abraham is now ready for the demands of international football.The Chelsea striker is back in the Three Lions squad for Euro 2020 qualifiers against the Czech Republic and Bulgaria after a brilliant start to the season for his club. The 22-year-old, a prolific scorer at youth levels, was first involved with the senior team in 2017 when he played in friendlies against Germany and Brazil ahead of the World Cup, but has not played since.He has forced his way back into the reckoning, though, thanks to his fine goalscoring form for Chelsea under Frank Lampard, where his seven Premier League goals make him the country’s leading scorer.“I mean, he’s the leading English goalscorer in the league,” Southgate said. “He’s obviously a player we put into the squad very young at a time when we wanted to look at some younger players and change the complexion of what we were doing back in November, ahead of the World Cup. “That was a bit early for him, and now it’s brilliant, the opportunity he’s been given by Frank, along with some of the other young English players at Chelsea, so that’s been fabulous for them. “So,…