If your company wants to make oodles of money in the UK, which is all Oatley will ever care about, then it's not too much off the bottom line to employ someone in that country to do the communications. aha ahhha ahhhaaaaaaaa.
They don't always know/care/are bothered to look it up.
I had this discussion only last month with an agency in the US who was questioning my spelling (nicely though)! And this company is a global one but based in the UK!
I used to have regular arguments (and I mean proper ding-dongs as she was rather fiery) with my (American) Director years ago who used to never take my work on matters of spelling or grammar (UK company, UK market) , when I was working on copy...