Yes I have had this problem before sometime it tastes very plastic.
We use the ‘pure’ milk sometimes from tescos it does keep longer.
Do you mean the ones you get in the cafe’s. I got mine from Makro.
We also use the unsweetened Almond milk and its great on cereal and last for ages.
Yes, that’s the type Pauline. Thank you for the tip. I will have to find my nearest branch. 
I am a bit relieved that others find something odd with milk too. Although not pleased at all. Going forward, I’m going to start writing down when and where I buy milk from and ask for refunds or contact someone.
Yes they need us to keep buying from them , if anyone has milk left over use it to make fresh scones the longer you leave it you will have lovely home made scones