The [20mph] commitment in my manifesto relates to local roads that are under the control of Lewisham Council. ... a borough wide limit would not affect the TFL controlled roads - unfortunately it is not in my power to set the limits on these roads.
Around 68% of Lewisham controlled roads are already within 20mph areas, and I hope to be able to bring the remaining 32% under a 20mph limit as soon as possible.
Here's a more up to date crash map: http://www.crashmap.co.uk/ and so the main ribbon of destruction will continue its merry path in SE23 regardless of potential limits as it is a red route and part of TLRN.
But it is not clear if Dartmouth Rd say (A2216) or Brockley Rise (B218) are part of TfL's domain. Or even Perry Hill/Sydenham Rd (A212). All major routes with trails of incident flags.
As a Perry Vale-ian I'll be delighted that after many promises, Lewisham can finally deliver a 20 mph limit. But it makes you wonder how they will deter traffic from the current elite zones...