New railings at Teddington Lock

I had to go back to 2012 to find a picture of the low fence that used to separate the lock from the towpath to put the new railings in context. Compared to what was there before the new railings are markedly different, being taller and more substantial, but compared to the other railings on the site the only difference is that these are black whereas the others are grey, as you can see on the other side of the barge lock.

I have no idea how the seemingly continuous works at Teddington Lock are justified but it must be said that they are making  good job of it all.