living in london finance

So the maximum is just under £13000 for those studying in London (I assume the uni in question is RHUL since I can't think of any UoL unis that aren't directly in London itself vs Greater London) and pretty sure that counts as in London for SFE purposes, although you could confirm that with them) whose household income falls below the minimum threshold. If your household income is higher than you will get a lower amount in total (although still more than someone with the same household income studying outside of London).
Note that the way the household income vs maintenance loan is calculated is that they expect your household (normally your parent(s) if a school leaver) to effectively "make up the difference" between the minimum and maximum loan amounts. This is probably something you will need to discuss with your family if your household income is above that threshold and you don't qualify for the higher means tested loan amounts.
If you should qualify for the higher loan amounts, then check to make sure your parent(s) have completed the information they need to send to SFE. If they have, then what's likely is that you've been initially assessed for the minimum and then they will continue assessing you for the higher means tested amounts. This is to ensure everyone has something in place at the start of the academic year (better everyone have the minimum and some people have the remainder added on a few weeks later, than some people end up without anything coming in until after they start!).