Apart from for government ministers and junior ministers you really are hard pressed to find many Tory MPs who agree with this proposed "sledgehammer approach" to quarantine. Leader of the 1922 Committee, Graham Brady, was just on "The World at One" taking it apart, and Chris Patton is similarly dismissive of it. The airline, travel and tourism industries are obviously agin and making collective voice heard; question is will Priti Useless listen. Moreover, are there enough Tory MPs with the spheroids to put their heads above the parapet at make their feelings know.in parliament?
I suspect the answer to both questions is no. The government failed to listen to industry ahead of the Brexit referendum, and actually fails to listen full stop, and why it should be any different this time I really don't know. The best I think that can be hoped for is a fairly swift back pedaling once the first stint of 3 weeks of quarantine is up.