Looking past the sacrilege some people see in adding milk to black tea, what do milkers use in theirs?
After trying half a dozen milk-replacement products over the year, I've found Barrista-spec oat milk is the winner.
In fact, we've now ditched buying cow milk entirely.
Don't know if they're available in the UK, but I really enjoy NutPods, especially the stevia sweetened variety, but the unsweetened flavors, and plain, as well. That's coconut/almond. I shake it strongly especially when new, and try not to add it to extremely hot beverages, but I've never had any separation, except once or twice when a carton was on its last legs of freshness.
I sometimes do a splash of that, and unsweetened Silk almond milk in strong tea or coffee (to take the edge off, but not add too much richness), and unsweetened almond milk alone will do it for me in weaker tea, but the NutPods of any flavor is a nice treat for most things, and you can control any sweetness.