You must be a striker/sympathiser if you did not understand the comparison !
Tesco, UK largest retailer with 4000 plus outlets and FY 2009 profits, 3bn, greater than BA.s share capitalisation, (2.7Bn today) a chunk of the drop in that valuation due to striker's (in)action.
Aldi, 400 UK outlets, profit not known but probably WAY less than Tesco. Aldi is a well run business filling a niche market BUT not in the same league as Tesco.
Chav city for Tesco, its financial performance suggests otherwise !