"If there is one thing more than another which public policy requires, it is that men of full age and competent understanding shall have the utmost liberty in contracting, and that their contracts, when entered into freely and voluntarily, shall be held sacred and shall be enforced by courts of justice", per Sir G Jessel, Printing and Numerical Registering Company v Sampson (1875) LR 19 Eq. 462 Is it still true (if it ever really was) that parties to a contract have the 'utmost liberty' to enter whatever contracts they like on whatever terms they can agree to? Discuss the extent to which, and the ways in which, the courts and parliament have eroded the concept of 'freedom of contract' with reference to relevant case and statute law