The Tories would suffer the biggest by-election defeat in British history in a by-election for Nadine Dorries' seat, a bombshell poll has revealed.
Labour would overturn the former Culture Secretary's 24,663 majority in Mid Bedfordshire which has been represented by the Conservative party since 1931.
The polling by Opinium, seen by the Telegraph, will shock nervy Tory MPs, many of whom have already announced they are standing down at the next election likely to dodge an embarrassing defeat.
