The "Roper Case" noise abatement order definitely limited fireworks events to 3 nights per year, down from the previous 5 they had prior to this.
It always used to be Saturday & Sunday of the weekend before the end of season, then the last Friday, Saturday & Sunday of the season.
I guess there is nothing to stop Towers spreading the firework events over a week (but still sticking to three in total). That said, you'd only do this in October half term to make commercial sense, so the "selected dates in November" seems odd.
That said, many councils who normally put on free firework shows around bonfire night are cancelling them due to budgetary restraints caused by the Covid-19 situation. Fireworks, by definition are pure money up in smoke. It is not unthinkable that Towers may have something up their sleeve to capitalise on this - fireworks on various dates in November with rides / theme park thrown in? Yes, it will cost them to open the park / stage the events, but think of all the revenue from tickets, parking, F&B, shops etc...