Im totally for blockades by far and away the most effective way of delivering renewals and heavy maintenance. However, in this case we got a blockade to commission the Balham and Clapham Jcn electronic interlockings ( i wont go there that were done originally in 52hr blocks nearly 40 years ago!!). This required Windmill Bridge Jcn to Victoria (c) being closed for 10 days and if these are to be used effectively the likes of Streatham Nth Jcn renewal need to be planned in as well and as much heavy maintenance that you can fit in. You then walk away from the route for abnormals for several years but that isn't what will happen. So as i see it currently all we are doing is NR taking even more access and denying passengers trains and more importantly fare income. Of course operators aren't bothered anymore as they dont have to concern themselves with farebox income.
in the case of the Christmas work there was a big track job in the middle of it. But as you know, you can’t have loads of engineering trains floating around when you are testing the new signalling.
What is done now is not really any different to how we used to do things 15-20 years ago; yes there’s more big blocks, but we also have more work that need it, especially Civils.