Since Harrison v University Hospitals Coventry & Warwickshire NHS Trust  EWCA Civ 792 and the ruling that a budget will only be departed from (up or down) if there is good reason to do so, there has existed the issue of what a good reason to depart from a budget upon detailed assessment is. Case law provides authority for what does and does not amount to a good reason, and there has now been time to reflect on this.
The matter of what constitutes a good reason is still subject to much questioning and debate, as there is no distinct definition of what amounts to ‘a good reason’.
The case of RNB v London Borough of Newham  EWHC B15 (Costs), which followed that of Harrison and Deputy Master Campbell, decided that departing from the hourly rates was a good reason to depart from the budget. However, this decision faced criticism, in that the Judges’ role in the budgeting process is to set a total for each phase in the budget and is not to approve or fix the hourly rates.
Therefore, for all intents and purposes, it is irrelevant what the hourly rate is for those budgeted costs, at the time that the budget is set. A Judge may look at it like this: whether a party spends 15 hours at £200.00 per hour, or 20 hours at £150.00, for a total phase of £3,000.00 – the figure is still the same. The total phase is just that: a total amount which the Court believes is appropriate for the work required.
The issue of hourly rates – and a good reason to depart from a budget – was revisited in Bains v Royal Wolverhampton NHS Trust. This decision went against RNB, as it ruled that to reduce the hourly rates in line with reductions made to those of the incurred costs would be to second guess what the Judge was thinking at the point of costs management.
Nash v Ministry of Defence  EWHC B4 (Costs), a high court decision following the decision of Bains, ruled that, if the change in hourly rate for incurred costs was a good reason to depart from the budgeted figures, it would bring about a case of double jeopardy. Thus, the only way to combat this, would be to undertake an assessment of the incurred costs at the costs case management hearing.
Jallow v Ministry of Defence  EWHC B7 (Costs) highlighted matters that do not amount to a good reason to depart from the budget, and how the costs management order (CMO) can impact the detailed assessment. Master Rowley commented that the two factors brought in front of him, namely the settlement figure in comparison to the pleaded value, and the reduction in the hourly rates, do not amount to good reasons for departing from the budget.
The Master concluded that a reduction to rates for incurred costs do not amount to a good reason to depart. To amount to a good reason, something specific is needed to have happened. The change in the hourly rates did not amount to something specific and had it done so, it would have set a precedent for parties to argue good reason every time rates have been reduced, as it is in many cases.
A more recent decision of an appeal case, Barts Health NHS Trust v Salmon (unreported) (2019)delves further into the matter of good reason and provides authority on departing down from the budget where the phase has not yet been completed. HHJ Dight concluded that, where the phase has not been completed, and the receiving party has claimed less than the total figure for that phase, then this amounts to a good reason to depart from the budgeted figure, in order that the indemnity principle not be breached. Interestingly, HHJ Dight then went on to say that once good reason has been established, then the paying party need not put forward any further good reason when additionally challenging the level of the total figure claimed and attempting to reduce the phase.
This raises some significant questions about the importance of the assumptions of the budget, following approval of the figures at the costs case management conference. The only page required for filing is the front page of the approved budget. However, should it now be required to submit updated assumptions, to reflect what the figures are based on, should any part argue a good reason to depart in relation to whether a phase has been completed. I suspect, as further good reasons become apparent, the use of the assumptions to show what the phase total was based on will become a much more widely used tool, in proving good reasons to depart, where assumptions widely differ from the actual outcome, and could come to benefit both receiving and paying parties, For example, where there has been more work assumed than has actually been undertaken, regardless of a party is claiming the total of the phase, or where the total of the phase is much lower than budgeted, regardless of whether the number of witnesses was much lower than the number anticipated.
There remains uncertainty as to what does amount to a good reason. With some guidance, I suspect there will be many more cases to come; however, will reluctance be shown by Judges to make those decisions given the gravity of those rulings?