This Bible was put together by Benedictine Catholic Monks. IT seems to have gotten to England after the protestants took over the region where the Benedictine Monastery was.
So one has to ask how exactly did this Catholic Bible end up with the protestant Church of England and then now in the London Museum.
Perhaps some protestants here can help me out with the history from the protestant side.
From the article:
The Bible was left behind by canons and forgotten about until it was found, according to legend, in a Delemont attic in the late 1810s or early 1820s. It was sold to an antiques dealer in 1822.
It was eventually sold to the British Museum in 1836 for £750, or $93,600 in today’s money.