// [Starmer] didn't actually say he would when asked last night if he would support it. And what's happened to Andy Burnham - he's gone very quiet. //
I'm not sure how much clearer Starmer could get than say, "I'm glad the Government has taken this decision." Yes, he also criticised the Government for delaying -- this, in essence, is the same thing he was advocating two or three weeks ago -- but it's clear that he supports the measure.
As for Burnham, he was calling for this sort of measure yesterday too, so he's clearly supportive, but equally angry that the Government was resisting the local support that Manchester would need in Tier 3.
In short, the reason you haven't heard from either is certainly not because they have been silent.
https://twitter.com/Keir_Starmer/status/1322632055801450505
https://www.theboltonnews.co.uk/news/18835542.andy-burnham-calls-covid-circuit-breaker-national-lockdown/