Government Communications Headquarters v Bacchus - dealing with unreasonable refusal to cooperate over medical evidence

Where (i) a party refuses to cooperate with orders for the obtaining of expert medical evidence, and (ii) the other party can demonstrate that the refusal was unreasonable to the extent that it cannot properly prepare its case without that evidence, an employment tribunal should make an "Unless Order" requiring the first party to co-operate fully by a certain date, failing which his case will be struck out.