Profit up 70% - great. But operating free cashflow down 17%. Their explanation:

"While operating free cash flow is lower year-on-year, this is a feature of
our generation asset mix. When it rains, operating earnings increase as we
don't have to run more expensive thermal generation, but cash flow is
impacted as we store the gas we purchased for use in the future."

Does that make any sense? I would have thought there would be no significant extra cost in turning up the throttle on the hydro generators?