The Spok is dead...

Most of Gower Street isn't included in the TLRN, but as the A501 is part of it, the TLRN here extends into the side streets, so yes, it's TfL who are the highway authority responsible.

Report it here:
http://www.tfl.gov.uk/tfl/roadusers/reportastreetfault/newfault.aspx

Claim as above.

Gower Street is the A400, not the A501. Does that make a difference? Sorry guys - no I dea how this works or what TLRN means.