Do I stay or transfer uni?

I don't really think a random course at QMUL is better than a "mid tier" uni for law, unless your definition for "mid tier" is ULaw or something :x

Idk it’s mid tier like Reading or Oxford Brooke’s law

I think it's six of one and half a dozen of the other honestly.
If you're otherwise happy with your uni I don't see any really compelling reason to change. Also if you can't afford London anyway I don't think that's really worthwhile.

it’s just that I’m not all that set on law I don’t want to regret it. Do you think it’s possible when I graduate I can do masters in London like in kings college or queen Mary for different course like business or is it less chance for me

it’s just that I’m not all that set on law I don’t want to regret it. Do you think it’s possible when I graduate I can do masters in London like in kings college or queen Mary for different course like business or is it less chance for me

If you can pay for it, yes. However masters courses in any kind of business related subject tend to be extraordinarily expensive as they're basically cash cows for universities to get in super wealthy international students (and sometimes domestic students) to effectively subsidise their other operations. That's pretty much the entire point of a university having a business school in all honesty.
That said you don't need to do a masters in business to work in "business". Most grad schemes don't care what degree you did, and a law degree is a useful background (arguably, more so than a business degree) working in any general corporate environment.

Yeah i understand the problem the costs are very expensive , i was just considering it because maybe if i did masters in finance accounting or business at higher ranked uni it will help me with employability etc as im worried law degree from mid tier uni wont stand out compared to other Russel group so might be much harder for the fields I want to work in

I doubt most employers could name all the RG unis, much less care about them.
For the majority of roles and employers employability is unrelated to where you studied your degree (or what you studied it in). It's based on what you have done to make yourself employable through e.g. internships etc during the course. The degree is usually just a tickbox for recruiters - does applicant have a degree in any subject at 2:1 or above Y/N? If Y proceed to next stage of application.
There are a couple of fields where they sift applicants based on what uni they studied at but these are very small fields and very few and far between (mainly investment banking/management consultancy - in which case I'd note, QMUL also doesn't cut the mustard there either). If you want to work in investment banking though then your degree subject doesn't matter but not going to a target uni makes it that much more difficult to get into it. However even among those who study at target unis, few actually get onto those grad schemes anyway.

Yes i understand i was just worried about the competition etc, also I understand that not going to target uni is much harder but i was also looking at degree apprentships in finance/business in London and i meet the alevel grade requirements yet for GSCE maths many say required grade 6 , would you say there is no point of me applying if i meet the other requirements but have grade 5 in maths yet meet English gsce requirements