Examination of effectiveness of masks, distancing and bubbles in various scenarios.
Masks are less effective in high transmission settings.
Social bubbles are less effective but in low transmission settings.
Physical distancing, unsurprisingly, is universally effective so no room for argument there. Only issue of course is that continuous physical distancing is not always possible therefore even with this measure there needs to be balance and pragmatism e.g. care home residents and prisons.