No one knows how long the impact of coronavirus might last, but several years to get back to where we were at the start of 2020 is by no means unlikely.
I hope you are correct but I suspect a very changed landscape at the other end of this crisis. Post WW2 rationing lasted in the uk until midnight on 4 July 1954

I agree - I just didn't want to say we could be stuck in BRINO for a decade, because I thought people might say I was wildly "project fear-ing"! So I gave what I thought was the shortest plausible time we could start the 'second dip' due to any Brexit effects without risking compounding the two sources of a lowered GDP (or whatever economic measure you want)

In truth, that time is only plausible if they is an unexpected turn-around in the progress of the coronavirus, such as finding an existing, already tested drug is an effective cure and/or vaccine.