A headteacher has vowed to put in place measures which would secure a school playing field over the summer, after travellers moved onto the site last week.
John Robson, headteacher at Great Yarmouth High School, said it was good news the travellers - who arrived on July 3 - had moved on, but the task now was making sure the field wasn't used again over the summer.
His plan was to enlist the help of local company East Coast Skips, who said they were able to put one of their skips filled with rubble in front of the field gate, making it inaccessible.
It comes after an angle grinder was used to break into the field, owned by the school, and a group of Travellers set up camp there for six days
They were joined by a second group who also brought horses onto the site.
They left last Friday evening, after a court eviction notice was granted, but it is thought they made their way to another playing field at Open Academy, in Heartsease, Norwich.
Mr Robson said: 'The borough council have done a brilliant job and they have cleaned the site.
'I've walked around it with councillor Carl Smith and it's actually very clean.'
He also said the council were going to pick up the bill of cleaning up the field.
He said: 'What I'm going to do is to suggest we do not use it for a couple of days just to err on the side of safety.'
Mr Robson had previously been worried they might not be able to use the field until September, due to contamination left by any waste.
'But the council have done a really good job,' he added.
'My job now is to make sure no one can get on that site.
'And what I'm trying to do is to see if East Coast Skips can leave a skip there for a while, because no one would be able to move a skip with three tons of rubble.'
Now the skip full of rubble has been delivered, and it is hoped it will deter anyone from trying to get on the field over the holidays.
n Police were called out on Monday to reports of travellers setting up camp in Haddiscoe.
A Norfolk police spokesman said officers were contacted at about 6pm regarding around six caravans arriving at Haddiscoe Village Hall Green.
The spokesman said: 'Officers attended the site and will be working with the relevant local authorities.'
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