1 · Header menu
“Centres” menu, opened
Families as columns, centres as rows. Adding a centre adds one row. The header has no topics menu: story types are five fixed tabs on listing pages.
2 · Filter bar
Centre filter, opened
A Centre menu that grows by one row per centre, beside five fixed story-type tabs. On a phone they stack.
3 · Subscribe
Choosing centres
“Every story” is the default. “Only some centres” opens a compact picker grouped by family. Article and centre pages use a one-line form for their own centre instead.