I have found the EU document but can’t copy the link. It is dated 1st December and gives the rules if we are a listed country, which means the titre test is not required but it does also say that the decision re being a listed country is not definite! Maybe things will become clearer after tomorrow.You can’t really blame the government. What category we will be out in is out of their hands, it is down to the EU. The latest info I have seen from them is that we will become a listed country which means the titre test won’t be needed. I will try to fund the relevant document.
As for the cost of the test, there are only 2 labs in the U.K. who can do it. Two years ago when we had ours done the lab charge was £55 + VAT. This will give you some idea of what your vet should charge. An Animal Health Certificate will also be needed, for which the vet will also charge. Expensive, yes, but not too bad when compared to kennel fees!
If you are worried about the test coming back negative, get another vaccination done first. Quite a few dogs do fail.