“15. It is the tribunal's task to assess what weight is to be given to evidence and as a specialist tribunal is well placed to do so. Its knowledge of the constraints operating on health care professionals who write reports is more acute than that of judges sitting without a medical presence. The covering letter to the GP, the GPs manner of expressing himself, an absence of clinical findings and the context of the evidence in relation to the other evidence are all to be weighed in light of the tribunal's practical experience and specialist knowledge of the exigencies of the doctor/patient relationship. It is to be remembered, of course, that a GP is neither a lawyer nor an inquisitor, is not expected to cross-examine his patients as if her were one, and has an interest in maintaining a good relationship with the patient.”
“16. The fact that the drawing of an adverse inference is not a penalty and is permissible only if the tribunal is satisfied that it is probable that the reason for the failure to comply with the direction is that the evidence does not exist or would harm the offending party’s case may require a tribunal drawing an adverse inference to give reasons for doing so beyond merely stating that there has been a failure to comply with a requirement to produce evidence. I say “may” rather than “must” only because in the case of, say, the person required to produce a bank statement to show that no capital is held, the only reasonable inference of an otherwise unexplained failure to comply may be that the bank statement would in fact show that the claimant did hold capital sufficient to disqualify the person from benefit.”
“62. What emerges from all this is a co-operative process of investigation in which both the claimant and the department play their part. The department is the one which knows what questions it needs to ask and what information it needs to have in order to determine whether the conditions of entitlement have been met. The claimant is the one who generally speaking can and must supply that information. But where the information is available to the department rather than the claimant, then the department must take the necessary steps to enable it to be traced.”