It does not mention anything about redundancy pay, merely a "four-week notice period". They don't go into any detail, however...what was is the title of the article?
On the flip-side any place of employment that does not automatically offer a "four-week notice period" is just trying to skim off the cream.
And in the case of redundancy - unless the company goes bust it should pay up a month, period. This occasion however, probably includes a clause to the effect of: "no redundancy payment if other jobs across the company are available".