Thank you all for your interest & information, certainly food for thought. Those are the certificates i have Comberton, thank you
In trying to get my head round this I've assumed that the first marriage would be recognised and valid by law but not necessarily by the Military, without consent of his commanding officer. Then upon his consent, another
full church wedding would need to take place for it to be recognised.
After his first wedding, he was posted to Mauritius for nearly 3 years and I've always assumed his wife went with him, but it now looks more likely that she stayed at home. The second marriage to Minnie is the only one recognised on his military record as well and there is no mention of his 1st child either (He did marry again after Minnie died prematurely, but that was a few years later, but that is another story

) This indiscretion didn't do his military career any harm as he was very well thought of in higher circles, and was promoted right through ranks to Captain, even awarded the MBE for his services.
So in a nutshell, i can therefore presumably conclude that no annulment occurred.