Whenever people discuss whether a bird is true to breed, so much so that exhibition is considered, stating where one resides helps give better answers. I am completely unfamiliar with the Standard for the Red in Australia.
In the US, we have both single comb and rose comb. The Standard is identical, except for the comb. There is no such thing as "heritage". A bird is either standard bred or it is not. Heritage is essentially a marketing term and an attempt to express concern for livestock not commercial in nature.
Now, as far as the bird itself? Here in North America it would considered a cull. The type, the shape is all wrong. The body isn't the rectangular, brick shape that the breed requires. The back should be long, and flat. The bird has no RIR type to speak of, sorry.
Bantam and Large Fowl must follow the same Standard. The only difference is the weight requirement.