Mike’s approach makes absolute sense. And that’s where benefit rules make a mockery of common sense…..
However, there may be a way around it…..
The difficulty with Mike’s approach is that you are deciding a claim AND that there is, initially, nil entitlement. That would have the effect of nullifying the claim ([b:fc801a6f26]para 2, Sch 7; CSPSSA 2000[/b:fc801a6f26]) and, therefore, a new (yes, another) claim would be needed for the JSA period onwards.
BUT, a convoluted interpretation of [b:fc801a6f26]HBR 86(10)[/b:fc801a6f26] may assist. Basically, you simply treat the existing claim as an advance claim (ignoring any reference to the “standard” period in terms of a “decision”).
Notify the clmt as normal (for the JSA period); but send a covering letter requiring further info (i.e. circs) for the standard period. If such info is received within one month, simply revise the start date. If not, original decision stands.
NB: Wonder why JSA started late? Did the clmt get pay-in-lieu / holiday pay? If so, that would count as earnings.
Hope the above helps.