Re: Indefensible
Reasonable is business specific, and the ICO have several sensible examples. I have silly ones.
Reasonable if I enter you into a prize draw for a weekend in Skegness, 0 days after the draw, or maybe 0 days after the prize is claimed, in case the winner decides Skegness isn't for them.
Reasonable if I sell you an ice cream, maybe 3-4 days (typical incubation period of e-coli).
Reasonable if I sell you an inflammable tumble dryer maybe 6 to 10 years in case of a product recall?
Reasonable if I sell an infant a widget with a life-time guarantee, maybe 4 score and 10 years?