Jason Robinson said England must win the Grand Slam in Paris on Saturday to put the "icing on the cake" after they were crowned Six Nations champions.
Scotland's 29-18 victory over France at Murrayfield on Sunday ensured England sealed their first Six Nations title in five years a day after they beat Wales to take the Triple Crown.
Eddie Jones' men head to Stade de France this weekend knowing a win would complete a first Grand Slam since 2003 in the Australian head coach's first tournament since replacing Stuart Lancaster.
And former wing Robinson, a World-Cup winner 13 years ago, stressed the importance of finishing off the job.
"England have got to win the Grand Slam this weekend. They've done fantastically well - Triple Crown, championship - we've got to finish it off on a high. Add the icing on the cake by beating France in Paris." Robinson told Omnisport at Rosslyn Park HSBC National Schools Sevens - the world's largest schools Sevens tournament.
Robinson was full of praise for the manner in which Jones has turned England's fortunes around in such a short space of time following the misery of their World Cup failure on home soil.
He added: "I think England have been going really well. At that level it is all about results and winning games and at this moment in time we have won the Triple Crown, we've won the championship, there's the Grand Slam to go at.
"So English rugby has turned a corner, a massive corner, especially after the results in the World Cup. So all things are positive. There's a long way to go still but Eddie Jones has done a fantastic job.
"I think he [Jones] has given them a new confidence. It is a clean slate, everybody wants something to prove and there was so much disappointment from the team.
"We are a much better team than we showed in the World Cup and it's nice to see the guys going out there, playing, enjoying their rugby and guys like Maro Itoje as well, stepping up to the mark and performing like a seasoned professional, not like a 21-year-old. England are just looking a lot more confident and are playing some great rugby."