For 2014 entry the reserve venue for the Southend / Westcliff schools was SHSG and for 2015 entry it was SHSB. I helped out at the SHSB session and there were about 96 sitters, including a whole school's worth from a school which had booked its year six residential for the weekend of the main sitting and a girl from somewhere in Metropolitan Essex who told me that she was taking the test so that she could go to 'X' school, which definitely wasn't a Consortium school, wherever it was
. (I don't know whether it was the child or the parents who were totally confused - it seemed a bit rude to ask!).
I would assume that the venue down here would be one of the Westcliff schools this year, but it might not work like that, of course.