Robert, I appreciate that there was a mistake made here and that I am partially responsible for that, that is why I came on the forum to ask advice - and why I thanked you for giving it in your own unique way! Sylvia - If its at all possible to keep both the pigs that I bought, learn from my mistake and rear them both to the freezer without them mating then I would rather do that than exchange because of all the red tape we would need to go through. I believed that saddlebacks didn't reach sexual maturity until between 7-9 months and that would potentially not cause a problem. As I said, I am new to all this and was looking for advice on whether or not it was possible to keep them together until slaughter and then I will learn to check for myself in the future thus avoiding the same problem happening again. If the advice is no - that is not a good idea, get the boar swapped if possible then that is what I will do. Many thanks again to everyone for your input.
melanie x