This number is for Aldi purchased lawn rakes, but it sounded like anyone can call: 0870 732 3023.
The belt on my lawn rake snapped and I was quoted: £3.99 for the belt, + £3.50 P&P, or 3 belts for £10 - still + P&P.
They did say try local garden centres but were not very convincing about the chances of spares being there.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix grass trimmers.