As you are aware, the only person who can really answer this is the admissions staff in the law department at Liverpool. However, I would have to say your chances are not very good.
As you will not have the prerequisite modules to enter into year 2 it would be likely that any potential offer for first year entry would be based on both your current results and your A levels. As well as this, you would be trying to transfer to Law, which without knowing the numbers at Liverpool, is likely to be one of the most highly subscribed courses they have (as it is with most universities). All in all it isn't looking too great in my opinion, but maybe they have some sort of transfer policy that I am unaware of at Liverpool whereby you might be made an offer based on your first year grades.