Hi... I'm more of a lurker on the other boards and this is my first post within this topic but hoping someone can advise please... Yesterday I discovered a crack in the shower tray - it's approx 6inch long but can't tell if its cracked all the way through or just the enamel surface iykwim? Do we have to replace the whole tray or is there some magic glue or something that will do the job? Thanks 