I have been part of NTU and UoN working with students now (no longer a student myself) NTU has one of the biggest Law schools in the country. Overall UoN historically has the better reputation but NTU is quickly climbing league tables to become a top university. I wouldn't knock it - PG LPC, BPTC students come to Trent from all other Universities including UoN to further their studies.
The facilities at NTU a really good, (UoN does have great facilities as well) but I think also NTU do more to help students gain experience in the paracticle sense of working in Law beyond the degree. You would do well at both uni's studying Law and ultimately the one you feel more comfortable with .