It would be very strange indeed to find a supermarket retailer who is not interested in expanding market share. 2% is practically nothing in the UK market.
Both they and Aldi have around this figure for a number of years.
Same business model. Sell on price, nothing else matters. Doesn't work in the long run.
A drop in the bucket.
Frankly, they are virtually irrelevant. Selling on one factor alone is going to cause that to remain the case.