Interesting article, thanks.
It says at the end:
"We are not proposing that bird feeding should end, as that would be unrealistic and unnecessary. However, we do suggest that, where possible, regular bird feeding should be cautiously reconsidered, reduced or discouraged around the remaining core habitats of Marsh Tits and Willow Tits, in light of their perilous population declines. The same may apply to providing nestboxes for Blue Tits and Great Tits in sensitive areas..." [my emphasis]
Which suggests it's okay if you don't live near woodland.
And: "Even switching the foods used for bird feeding could be beneficial, by avoiding sunflowers, peanuts and fats that are favoured by the common tits and, instead, providing millet or cereals that are attractive to declining House Sparrows, Tree Sparrows Passer montanus and other farmland birds."
So I think I'll try this, as I do live about half a mile from some woodland, - though don't know whether it's inhabited by Marsh or Willow Tits (apparently picky about type of woodland).
I also read elsewhere that Marsh Tits (who hoard food - seeds and insects) are sometimes seen at bird feeders, so wonder if (if one's garden is visited by them) it'd be helpful to put out seeds and mealworms (i.e. insects) for them?
I do notice that my bird table is visited by different birds compared to the hanging feeders. The Great and Blue Tits definitely prefer the hanging feeders. So maybe the thing to do is ditch the hanging feeders, ditch the suet completely, and have table only, with seeds (except sunflower) and mealworm only on offer. So that it's less beneficial for the dominant Great and Blue Tits, but still helpful for other birds including maybe the Marsh and Willow Tits.
100% agree that it's essential not to use chemicals such as weedkiller, etc etc in the garden, which destroy food/habitats for countless creatures.