I looked at the guarantee on Maxwell Scotts site and it only says they will repair the handbag but it did not cover wear and tear so what do you think using the bags is? Its confusing to me? It seems they are not guaranteeing anything because as soon as you use it isn't wouldn't it come under the definition of wear and tear.
I have taken this from the website: "All luggage bags, briefcases and handbags manufactured by Maxwell Scott come with an amazing lifetime manufacturer's guarantee for the natural life of the product. Due to the high build quality and leather durability these products are designed to last substantially longer than most high street equivalents. Under this guarantee, we will undertake any repairs due to a manufacturing fault on zips, stitching, clasps, linings etc. free of charge (you only pay the cost of postage). Please note, we cannot be responsible for tears, abrasions or damage from misuse; however we can still repair for a reasonable fee."
This seems pretty good to me! Are you not mistaking misuse for every day wear and tear?