Despite what many believe, particularly the highly opinionated AdE (who appears to have knowledge of salty boats, but I am not aware that he has ever owned a steel canal boat, narrow or wide), there is nothing wrong with most boats built by LBC. The fact that they once dominated the market for shells and their high production figures allowed them to make economies of scale and offer shells at lower prices than many serious steel boat builders (ignoring the general steel fabricators who made a few ugly sewer tubes as a sideline) does not automatically imply they are badly built and of poor quality. There are of course exceptions and Friday afternoon boats that may have faults, but once they produced about 50% of all shells sold each year and if 5% have significant faults, that is a lot of boats. Trabant - no; Vuaxhall - maybe.
Of course a LBC shell will use less gas - because the owner is more aware of costs and does not waste heat unnecessarily.