We had Kasabian there a few years ago.
I remember them announcing a 'festival' there in 2005 (featuring Status Quo ) which later got cancelled, can't remember why but probably low sales.
Found this. What a line-up.
https://www.ebay.co.uk/itm/205614772601?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338722076&customid=&toolid=10050
There does seem to be some truth to your suggestion about the concrete, apparently there were concerns about 'dancing in the stands'. Thankfully not a lot of that recently.