An immigration enforcement hotline was called 68 times by MPs or their staff last year, it has been revealed.
Charities have now written to Commons Speaker John Bercow asking MPs to pledge not to inform on constituents, arguing people should not have to fear being reported on by their MPs.
The pledge has been signed by 107 MPs, however, Heidi Allen is the only Tory.
A number of Tory MPs said they “would be expected by most constituents to report any suspected illegal activity”.
Some Labour MPs also declined to sign, without making their reasons public.
Of the 68 calls by MPs to the hotline, 34 were from Conservatives, 32 from Labour, one DUP and one Lib Dem.