“Throughout the very wet winter, we have experienced a number of issues on the track and working with drainage experts, we have identified an area that would benefit from being upgraded”
That seems more than a little worrying given that the issue on trials days I thought was the first time anything like that had happened, I don’t recall “a number of issues” ever being mentioned prior to that incident.
That leads me to believe that the issue may either have been more serious than they first let on at the time or there is a bigger more fundamental problem with the older parts of the drainage system that they have just now discovered or maybe has made itself known to them (i.e. another drainage collapse?) since the Festival.