I like UHT Skimmed milk, I used to buy Lidl's but theirs has gone up in price so I stick to Aldi now.
Coloured water ! Blurgh. UHT is the only stuff you have after Russia has Nuked you !
Gonna be honest , due to being force fed milk that sat in Classroom all day ( prior to Thatcher stealing it ) I cannot drink the stuff on its own ! I’ll have it in tea and coffee, even cereal but only if said cereal is sweetened . Otherwise it’s rank rotten . Just a wee mental block thing I’ve carried for nearly 50yrs lol
I like UHT Skimmed milk
Can't comment on the taste, but frothing is a result of the fat/protein ratio. You need fat to create the texture through bubbles, and the protein to stabilise them. Coffee shops use whole milk as it has a higher fat content giving a denser and creamier foam. Theoretically something could have been added somewhere along the food chain which is affecting the taste and froth, but it is perhaps more likely to be a reflection of the production methods affecting milk quality (higher degree of pasteurisation for example).
I'm sure you're correct but I recently got a bean to cup coffee machine with a steam wand frother and bought some full fat to try with. We normally get Asda semi skimmed. Although I mainly drink americano style with a drop of cold milk added I do like an occasional latte or flat white. In the end I could barely detect any difference, and if anything slightly preferred the semi skimmed.