Overall London numbers have been surprisingly flat ('ish), even though the Indian variant must have already taken over from the Kent one.
There may be small fluctuations by borough (e.g. Greenwich has gone up slightly very recently - probably due to a school outbreak and/or LFT testing) but comparing to Bolton it is not yet the course for concern.
The one borough worth keeping an eye on is Hounslow. It is not yet clear whether cases there are rising or plateauing.