“I agree that the more unreasonable a clause is, the greater the notice which must be given of it. Some clauses which I have seen would need to be printed in red ink on the face of the document with a red hand pointing to it before the notice could be held to be sufficient.”
That is quoting Lord Denning from the case of Spurling (J.) Ltd. v. Bradshaw  1 W.L.R. 461. It is judgments and decisions like these that were used as precedent in common law and shaped legal jurisprudence. The House of Lords infact, has been responsible for most of the judgments that have shaped the laws in most common law jurisdictions around the world. While Denning and Atkin were notably the best judges the house ever had, this Court has maintained itself as the highest and most rational judicial body in common law.
However come 2009, by the Constitional Reforms Act, 2005 coming into force the judicial division would now be separated from the House of Lords and be called the Supreme Court for the United Kingdom. While the functions would remain the same, this would be an end of an era of the most respected and influential court in legal history in terms of title.