At the age of 29 , he was elected as a Member of Parliament ( MP ) for a Lincolnshire constituency , holding the seat for the Conservative Party in a by-election on 4 December 1969 .
At 29 , he was elected as Member of Parliament ( MP ) for the Lincolnshire constituency of Louth , holding the seat for the Conservative Party in a by-election on 4 December 1969 .