“The next question is: how procedurally is the amount of the indemnity in relation to costs to be quantified? Should I enter judgment for an indemnity to be assessed and then direct an account or an inquiry, perhaps before a costs judge? It seems to me that the most convenient course is simply to make a declaration of Grant Thornton’s entitlement to an indemnity and then to make an order for costs which reflects that entitlement, and then to direct a detailed assessment of the relevant costs on the indemnity basis. It seems to me that procedural course is supported by the approach in Gomba Holdings.”