The red brick wall, and gates which can be slotted in when needed, will protect the St Bede's and River Park areas.
Tributes To Bournemouth Schoolgirl Who Died Of Meningitis
Tributes have been paid to 16-year-old schoolgirl Connie Moore, from Bournemouth, who died from meningitis.
Alistair Brien, head teacher of Bournemouth School for Girls, described the year 11 student as "a lovely, gentle-natured girl with impeccable manners''.
He added: "She was easy to talk to and totally reliable. She was studious and hard-working in class and also a talented out-of-school singer.
"Always bright and bubbly, she had a wonderful laugh, much appreciated by all her friends. She was always there for them and could always cheer them up if they were down.
"Our thoughts and prayers are very much with Connie's family at this time. We will, in the coming days, have our own commemoration of Connie's life.''
In a letter written to all parents of girls at the school, Mr Brien also issued advice about the warning signs of meningitis.
"If you have any further concerns please do not hesitate to contact me or Public Health England and, of course, if you have any concerns about your own daughter's well-being please contact your GP immediately,'' Mr Brien said.
"Wessex Public Health England Centre advises that no special measures are necessary at the present time. There is no reason to make any change in the school routine and no reason for children to be kept at home.''
Friends took to social networking sites to pay tribute to the teenager.
Katie Hill wrote on Twitter: "Find it so scary how people can be here one minute and gone the next, RIP Connie Moore.''
Lacey Butcher said: "RIP Connie Moore. Went to primary school with you, sweetest girl in the world. Never asked of a thing from anyone. Such a sad loss. X''
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