I am of an age to remember when washing-up liquid first came out - 1956 I believe. It was called Squezy. The attraction for us boys was that when the bottle was empty you could fill it from the tap and use it as a water pistol.
I agree with what bhg said at 12.30.,but some manufacturers just put different supermarket labels on their products, rather than alter too much in production lines.
That apart, sometimes a supermarket has two differently priced 'own label' items ( standard and basic) and the cheaper basic is identical to the higher priced one.
Interesting article on matters in the following link :-
I was in Co-op the other day. I needed washing up liquid and decided to get theirs as I seem to remember it being fine. Nooòoo...watery, put some on a dish brush and I'm lucky if it does one mug, no grease cutting. Bought it on Monday...1/4 of the bottle is gone. Fairy when I next go out.
I find aldi and Lidl are good for rubbish bags and cling film. Aldi's actually sticks!
We use to sell Persil Lemon burst but a not seen it for a while. A had a quick look today but look's like its no longer stocked, not seen if for a while now , but will maybe ask around at work tomorrow