In theory I would be willing to switch sides of the road in reality I think it would be logistically difficult and horrendously expensive.
And of course it would give us the immediate problem that most cars would then have the steering wheel on the wrong side.
Give it 10 years.....problem solved...and all our old RHD cars become 2nd-hand imports for Sri Lanka and whoever. :-)
Or the government subsidises conversions.....at scale it could be fairly economic. The automakers have the parts.....
They're go to Samoa I suspect but then they'd change back to driving on the right just because we did.. When Sweden changed from Left to right side driving back in 1967 for 10 years before the change all new cars sold had to be LHD. I suspect here it could be reduced to say 5 years . If we did change after a week it would seem like you been doing it all your life. Was easy when I went to work in the US in the mid 90s.