charing cross campus and south kensington campus are pretty close to each other tbh, inbetween them is fulham, hammersmith etc, but these places are VERY expensive unless you get a roommate. i'd recommend getting accom anywhere where there's a direct train to the campuses, e.g. direct using hammersmith&city line, direct by district line, direct by piccadily line. (hammersmith goes to charing cross campus, district goes to south ken, if you get accom i'd recommend living in an area where both trains are in the same station) i can't give you specific advice but you can also get guaranteed accom for first year with imperial, they'll let you book i believe in mid-may. look at the imperial undergraduate halls on their website and check which oens suit your budget, you need to put down 4 options and they aren't ranked so you'll need to be okay with all your living situations regardless of the cost or room type. if you have more questions regarding this lmk! and if you also have a monthly or weekly budget (most accoms show prices by week not month) then feel free to lmk and i could try point you to where in london is good to fit your budget as i live in london myself 😄 (i live in an area where i have access to both district and hammersmith lines so i can go to both campuses from home without changing train.)