'Open Degree' title, is this a potential pitfall when applying for teaching courses?

I'm wondering if I'm likely to have a fair chance if I apply to either a primary or secondary biology course (apples and oranges with regards to the answer to this question I know.)

My concern is that I have an Open degree (from the open university), it is 1st class honours, but obviously not a named degree, also for some reason it is called a BA, even though I studied roughly 50% science. I'm personally not bothered by this, it was my choice to do an open degree as I could not find a top ranking university anywhere in this country that would let me combine my two primary interests or even do a major/minor type combination in them! Surprisingly for me even combined honours degrees consider a faculty jump from humanities to sciences a jump too far; timetabling? My interests were History and Biology, and I didn't want to specialise in a subject like psychology just to tick the humanities and science boxes. So rather than go to a university that wasn't really worth getting into debt for I chose to work and study with the OU which let me choose whatever subjects I wanted so long as I didn't care about my degree title (so minimal debts thankfully).
I studied roughly 50/50 of each subject, maybe a little more humanities than science because of the credit waiting for individual modules.
I got straight As at A-level and good GCSEs so that isn't a problem.

Has anybody had experience of applying to teach with an Open Degree, or any thoughts on the matter?

Somebody has suggested I should try getting on a specialist masters in my chosen subject area to boost my chances, but to be honest I can't see that I wouldn't be facing the same potential barrier when I apply for that regarding my degree title. Also, I was hoping to study a masters in population genetics later part time when I have an income and a 'proper job' to fall back on.

Thanks for your advice.