AFAIK There should be meetings taking place later this week with organising bodies, as of yet the BSB schedule for the Brands Easter meeting has yet to be finalised.
What I do know is that there are 4 weekends left in this month, then 4 in March which to me makes Easter 9 weekends away
I also know Mallory holds 32 on a grid and so far this coming seasons DD entry list (that's those that have sent in a DD registration & monies) exceeds that, there's even enough to fill a grid at Pembrey. Not that I expect everyone registered to be at every race.