The 25-year-old, who celebrated his England recall by smashing a career-best 247, including 27 fours and 11 sixes, for Somerset against his old county Derbyshire earlier this year, said on Tuesday he had learnt from his mistakes.

"I was very disappointed at being left out after the World Cup," Blackwell told reporters ahead of the one-day international series against Bangladesh starting on Friday.

"I feel very lucky that I've got another chance. This time, I want to make sure I rectify what I did wrong earlier and stay in the side for 10 years."

The left-handed batsman, who bowls useful spin to back his explosive batting, had an encouraging entry into international cricket last year with an 82 against India in only his second match at the ICC Champions Trophy at Colombo.

But he did not get a single half-century in his next 12 games for England to finish his first international stint with just 252 runs from 14 matches at an average of 19.18.

It was not lack of ability, however, that was regarded as the sole reason for his omission.

"There were more issues, like fitness and lifestyle," Blackwell said. "People thought I did not work hard enough.

"I've always been a thickset guy. If I have to go down to 12 stone or something, I'll probably have to cut off one leg," he joked.

"But I've set myself goals and I'm working towards them."

The big-built player, who tips the scales at 108 kg, says his target is get below 100.

WARNING LETTER

Blackwell finished the county season with three centuries and added another ton in the Sunday league, but things were bad earlier in the summer when he got a letter of warning from the Somerset team management.

"Some of the players were told in writing to pull up our socks, which was very frustrating," he said.

"All the cricketers who got the letters were pretty senior guys and it wasn't that we wanted the team to do badly. But on hindsight, I suppose people could say it worked because things got much better in the second half."

Now that he has returned to the international fold in the one-dayers, Blackwell says he is also gunning for a Test spot.

"I believe there is a chance that a third spinner might be included for the Sri Lanka tour and I think I have an advantage over the others because I'm here in Bangladesh with a chance to prove my worth."

England travel to Sri Lanka for three Tests and three one-dayers after the one-day series in Bangladesh ends on November 12.