"The situation has been well publicised and we have tracked him for a quite a while".
Butland is unlikely to be considered anything more than a back-up option at national team level for now, especially when you consider that he is playing in the Championship.
Former Republic of Ireland global Andy Reid has given his blessing to Declan Rice, telling talkSPORT (Hawksbee and Jacobs, 13/03, 13:30-14:00) that he hopes he does really well for England.
The mentality of goalkeeper Jordan Pickford is less clear-cut, however, having been called into question after a series of mistakes in the recent Everton defeat to Newcastle, where he was spotted sticking his tongue out - behaviour labelled "bizarre" and "ridiculous" by former England captain Alan Shearer.
"When you're asking a player to transfer association you have to feel the player has a future with you".
Preston-born former Ireland worldwide Kevin Kilbane has been outspoken about Rice's switch and said it "makes a mockery" of global football.
On the other hand defender Keane is now part of the squad and the England manager says former Republic youth worldwide Jack Grealish could be part of his plans down the line.
"But his form has been excellent and we like what we've seen in terms of his personality, his character and his leadership qualities".
"We have had players eligible for us who have been with us at under-16s and other countries have given them senior caps very early", Southgate told BBC Radio 5 Live.
England face the Czech Republic at Wembley on March 22 before an away trip to Montenegro three days later as they begin qualification for Euro 2020 - of which the semi-finals and final will be held at Wembley.
Bournemouth midfielder Brooks, then a Sheffield United player, was part of the England Young Lions team which won the Toulon Tournament in 2017.
"What I like in our squad, is there are a lot of players who want to be among the best in the world".
"We have always tried to look at that as ethically as we can".
"But, we're pleased with what Jordan's done and we've got to help him through what was hopefully a blip at the weekend".