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Jusf flicking through the Run section at the back of Men's health (it was in my hotel) and they have 2 pages of training plans.
The 0 to 5k in 5 weeks seems reasonable if the majority of the target audience are fairly fit to start.
The 10k looks tough as it is targetting sub 45 mn, which seems fast to me for a 1st 10k (but I am very slow).
The half plan looks reasonable if it is building on 10k fitness.
What seems ridiculous and dangerous is the marathon plan. This claims to get runners from a half marathon to a full one in just 6 weeks.
week 1 and 2 - 2 x 9.5 k easy, 16k tempo, 19k long
week 3 and 4 - 2 x 13k easy, 11k tempo, 32k long
week 5 and 6 - 2 x 8k easy, 8k tempo, 19k long
I'm no expert, but surely a jump from 19k to 32 in a week is far too much, and would anyone be able to run a marathon with just 2 training runs which were over half the marathon distance.