What it basically comes down to is there are several native languages in the United Kingdom - English, Welsh, Gaelic, Scots, Cornish and more - but only English is respected on the whole.
He’s not even asking for every ticket to come in both languages, just to be sent one in Welsh when asked for. I think it should be a legal requirement to provide any document in any home language requested, personally.
Oat milk I think has the closest viscosity to dairy milk. I use it in tea and on cereal a lot. I think the only area it struggles is with baking, I’m guessing it’s the fats (or lack of)