I don’t know if they are still going but WCS ladders in Essex were superb ladders back in the day,the Ali ones they sold just hooked over on the run no need for all that locking with the bar each time.
They were used obviously daily and they lasted years before anything needed to be replaced,the only thing in fact I replaced on 4-5 I got from them was the very hard wearing rubber feet,nothing lasts these days.