Bangura played for the Sierra Leone national team and is notable for having been the victim of human trafficking when he was a teenager and also the subject of a deportation case in the United Kingdom in 2007.
Bangura was born and brought up in Freetown, Sierra Leone, and his father was the head of the Poro Secret Society, however he died when Alhassan was a young child.
However, in Guinea he met a Frenchman, who he did not realise was involved in human trafficking and who took Bangura to France intending to make him a male prostitute.
He made a total of 20 appearances, 16 of which were in the Premier League as Watford finished bottom of the table in 20th place and were relegated back to the Championship.
[10] He was subsequently signed in August by Blackpool on a non-contract basis,[11] and later the same day was an unused substitute in a 0–0 home draw with Derby County.
[16][17][18] He picked up a knee injury later in the month whilst training and was required to undergo surgery which led to him missing the start of Rovers season.
Bangura impressed new Sky Blues boss Tony Mowbray to the extent that he was rewarded with a short-term deal to join the club until the end of the season.
[25] During his time away, he worked with the Premier League to raise awareness of the growing number of teenage players being tricked into leaving Africa for Europe.
However, it was also revealed that he would not be able to play home matches in Sierra Leone, as he has said he feared his life would be in danger in the country he was forced to flee.
However, the Home Office lodged an appeal on a legal technicality, claiming his status as an asylum seeker changed when he turned 18 years old.
[33] On 11 December 2007 he lost his case to stay in the UK, despite Bangura fearing a return to his homeland, where he could be under threat from the Soko tribe, formerly led by his late father.
"Four days later the Home Office announced that Bangura would be allowed to remain in the UK while he applied for a work permit, a process that would take place in parallel with his appeal against deportation back to Sierra Leone.