Aren't Bangladesh saying she isn't a citizen though and never was. She was born here, raised her and her parents paid tax here. I can't see how we (we bring the Uk) can argue that makes her a Bangladesh citizen.
Without going into loads of detail as it's been covered before, as part of her appeal SIAC heard expert testimony that Bangladeshi law says that she became a Bangladeshi citizen through her parents when she was born ('i.e. by descent"). Also that she can hold dual citizenship (Bangladeshi and British) until she is 21. She must then apply to renew her Bangladeshi citizenship.
In fact both the government and Shamima's experts more or less agreed that was what the written Bangladeshi law says. However, Shamima's experts and legal team said that because the court system in Bangladesh is corrupt, the government would be likely to tell the courts to ignore what the written law says and rule that she is not a Bangladeshi citizen. They argued that while in law
(de jure) she was a Bangladeshi citizen, in practice (
de facto) she wasn't because the Bangladeshi government wouldn't allow it.The Bangladeshi Minister of Foreign Affairs statement that she wasn't a and never was a citizen demonstrated that.
SIAC ruled that as a matter of fact the Bangladeshi law said that she was a citizen and the fact that in practice Bangladesh would never agree should not be considered.