The size of the rod caught numbers for 2020, this season, might tell us more.
Sure has been a reported increase in numbers in some areas, but the overall catch records at end of season are the marker.
Not in my neck of the woods. Most of the spring lost to lockdown and most of the summer lost to drought (still ongoing, many rivers still off the gauges at the wrong end!). There is a stack of fish but the rod catch will be below half of normal.