I believe you can fish for Bass anywhere in the designated Bass Nursey Area (Poole) between the dates mentioned as long as Sandeel is not used as bait?
SIFCA confirm
Bass Nursery Area
Under The Bass (Specified Areas) (Prohibition of Fishing) (Variation) Order 1999.
Fishing for bass, or fishing for any fish using sand-eels as bait, by any fishing boat within any part of the harbour, as defined, is prohibited between 30 April and 1 November.
I am unaware of any update.