Sol Campbell believes he is the man to fix England's leaky defence and insists he would still jump at the chance to work with the national side.
Roy Hodgson's men head to Euro 2016 with a wealth of attacking options but their ambitions in France may hinge on their shaky back line.
Chris Smalling was sent off after two clumsy challenges in the FA Cup final on Saturday while both John Stones and Gary Cahill have endured inconsistent campaigns.
Campbell, who played 73 times for England and in six major tournaments, spoke to the FA in 2012 about a coaching role but was overlooked in favour of Gary Neville.
The former Tottenham and Arsenal centre-half, however, insists he holds no grudges and has opened the door to another approach.
"I asked to help out with the defence four years ago but isn't that Gary Neville's job?" Campbell told Press Association Sport.
"If they want someone to come in and help the young defenders I would absolutely do it, I'd do it all day long.
"I've just passed all my coaching badges, I've coached around the world and I love England. I've been with England since I was 14 years old at Lilleshall, it was my dream.
"I would do anything for England and I've always thought I could bring something to the defence in a coaching capacity.
"So yeah, I'm here if they need me. But would the FA come back? Who knows?"
During Campbell's career, England were flush with top-quality defenders as he, John Terry, Rio Ferdinand, Jamie Carragher and Ledley King all emerged during a golden period for English centre-backs.
The production line has dried up, however, in recent years and Campbell believes more can be done to help young defenders finding their way at international level.
"You have to get into these defender's heads," Campbell said.
"I know a lot of people do videos and things like that but I need to be on the pitch and see what they see.
"You have to be out there and ask, 'what are you seeing there?' You look at their physicality, their technique and you get everything up to the standard you need for international level.
"There are minor details in everyone and it's about seeing the right details to make a difference. If you've played that position and in those tournaments it's easier to see those details."
England have not gone past the quarter-finals at a European Championships since 1996 but optimism is growing again after a strong qualifying campaign and friendly wins over France, Germany and Turkey.
Champions, however, are rarely made without a solid rearguard and Campbell believes England may have to adjust their tactics if they are to succeed this summer.
"By law and by history you cannot win a major tournament without a strong centre-half partnership," Campbell said.
"The tactic could be we have to move better going forward, press high so they don't get to be back line and put them under pressure.
"The law of averages says if a team keeps getting into good positions something will happen. So the fewer times opposition get into those areas, the better chance we'll have."
:: Sol Campbell was speaking at the William Hill Euro 2016 preview evening. To win the tournament, England are 8/1, Wales 66/1, Republic of Ireland 100/1 and Northern Ireland 250/1.
Source: PA
