Thanks for the responses guys
Her (total guess on sex, just an assumption based on the fact she was in the group of babies with slightly smaller heads lol) breeder was told by the chap who originally owned her parents that they were both Northerns, but was later informed by someone else they were Tanimbars. That's why I wanted to double check it with a bunch of more experienced owners. She was lovely for the first week we had her, ate fine, would occasionally be spotted out exploring her new home. One time she was caught climbing up one of the fake plants in the corner of her viv lol. But for about a week now she seems to have been living under her substrate. Thankfully yesterday she ate something just after posting those pics but she did take a little coaxing. Though she does have the typical Tanimbar attitude, all hissing & puffing. Hopefully we'll be able to start the hand feeding in another week or two & she'll eventually calm to our presence.
Also, from what I understand Tanimbars are quite commonly imported into the UK for sale in local pet shops & what not. So if you see a Bluey in a UK pet shop, there's a strong chance it is a wild caught import.