Aldi are advertising that they are selling a 1400 watt lawnmower from the 27th of April 2014. It has a 37cm cutting width, a single wheel height level adjuster and comes with a 36 litre grass collection box.
I wondered where Aldi were sourcing this electric lawn mower and searching around I came across the Einhell BG-EM1437 which looked suspiciously similar.
The Einhell BG-EM1437, available from WorldStores, seems to have an identical specification to the Aldi mower too. In fact the only difference I can see is the the Einhell lawnmower is blue, the Aldi mower green.
UPDATE: If you missed out on this Aldi lawnmower Tesco are offering the similarly specified Tesco 38cm 1400w ELM042012.