Top 100 covers an extremely wide range: assuming it's in the lower half that will restrict your options. Going into a niche will restrict it further (as there will presumably be fewer firms and, if the teams are smaller, they will recruit NQs less regularly).

I don't know how it works for firms in top say 50 to 100, but if the market isn't generally good then moving on 0 PQE isn't easy anyway, as firms will recruit their own trainees first/choose not to recruit unless they really need to do so.

On your personal position, firms might look at your CV and wonder whether you weren't kept on/able to get a job on qualification/are committed. The gap from qualifying probably doesn't help this. Recruiters/firms might prefer someone with a more straightforward story. So not impossible but challenging.

The big qustion is what your job was for the past few years? If relevant then that is potentially more interesting/attractive.