Two points:
1) why do you answer the question that was already answered two hours ago?
2) when a point is being debated it usually helps to gather relevant information in the same place for ease of reference
Not sure what’s happening there but wouldn’t a developed Old Barn Way at Southwick be ideal - near to Lancing complex, A27 and trains.
Withdean has more space, unless some of the Rec at Southwick can be used.
Not sure if Southwick comes under the jurisdiction of B&H Council.
Could wait for...