Harris Westminster Sixth Form opened in 2014 and there have been whole-school assemblies every week (often more than once a week) since then.

The story of Harris Westminster and how it has been shaped by assemblies can be found in the Crown House book "A School Built on Ethos"

https://www.crownhouse.co.uk/publications/a-school-built-on-ethos

If all you want is the assemblies then read on.