Mistake in Graham Holt article in Student Accountant?

I have a question related to an article (Business combinations Pt 2) in SA 4/2009 written by Graham Holt.

On page 52 in working (a) Goodwill and (c) Retained earnings he recognises the full amount of goodwill impairment but under the partial method (old method) isn’t it only the Parent’s share that has to be recognised?

(I took the methodology from an article in SA 08/2009 Impairment of goodwill. According to this only P’s share should be recognised when applying the proportionate share / partial method.)

Could anyone explain to me whether I am wrong or there is a mistake in the article?