Slimline water butt. needs repair, read text (Knotty Ash L14)

100 LTR slimline water butt only..originally from Wilko. this has a small leak from the side which was repaired a couple years ago and served well until recently ... I am sure it is repairable ( loads of 'how to' on you tube ) but I no longer have the dexterity or a soldering iron to do it.
Thank you