It appears the 'type' that GetSpellInfo returns has been extended to '5' for Runes and '6' for Runic Power spells.
There doesn't appear to be any way to see which Rune(s) or how much Runic Power a spell requires tho (cost being 0 in both cases)...
If anyone finds a way of working this out - plz do post it here
Thx
p.s. I realise I could scrape the tooltip but that's crude