London accomm halls

Can anyone recommend some intercollegiate halls that I can apply to now? I’m hopefully going to UCL and I got an accommodation offer recently but I’m not happy with its location. I looked at the intercollegiate halls and there’s a waiting list in August:/ is there anywhere else I can apply right now that is close to UCL? I’ve heard of something called “unite students” but not sure what it is and how to proceed.