Showing my ignorance here but with President elect Biden not taking office until 20th January where does that leave US policy on border access in the meantime?
If nothing changes in the interim as I would imagine then even if the UK drops it's 14 day quarantine period, the border to North America will remain closed into next year notwithstanding any policy decisions that the incoming POTUS might choose to make.
I appreciate quarantine affects all countries and all visitors but the US is always seen as such an important long-haul market.