Campaigners have written to the council asking officials to confirm if a south London park will now be opened to the public following the cancellation of major music festivals.
Lawyers for the group that brought the challenge said that upcoming music festivals have to be cancelled after a High Court ruling over the use of Brockwell Park to host the events.
The High Court ruled on Friday on the decision to use parts of Brockwell Park as an event space for more than the permitted 28 days per year, finding the council's decision to grant a certificate of lawfulness was "irrational".
Rebekah Shaman, a local resident and member of the Protect Brockwell Park group, brought the legal challenge against Lambeth Council over the use of the park for festivals scheduled to begin on May 23.
Campaigners have written to the council asking officials to confirm if a south London park will now be opened to the public following the cancellation of a major music festivals
PA
The case centred on the council's decision to certify the planned use as lawful under permitted development rules, which allow a temporary change of use for up to 28 days each year.
Mr Justice Mould ruled in Shaman's favour, finding that the council had erred by "taking into account the mere prospect of planning permission being granted."
Sir Mark Rylance welcomed the High Court's decision, saying: "Wonderful news. Brockwell Park will be open to all for free again this summer. No walls. No trucks."
Local residents have complained about the impact of the festivals.
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Brockwell Live hosts six festivals, including Mighty Hoopla, which was set to feature artists such as Kesha and former Little Mix singer Jade Thirlwall
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Summer Tabbakha, a graphic designer, said: "This is our green space, as you can see it's fenced-up, we don't get access to it and it's just destroyed for the rest of the year."
Her eight-year-old son, Ammar, said: "We can't sleep in the bedroom because it's too loud."
A Lambeth Council spokesperson said: "We are currently assessing the impact of this judgement and determining next steps."
Brockwell Live hosts six festivals, including Mighty Hoopla, which was set to feature artists such as Kesha and former Little Mix singer Jade Thirlwall.
Lawyers for the group that brought the challenge said that upcoming music festivals have to be cancelled after a High Court ruling over the use of Brockwell Park to host the events
PA
The solicitors' letter from Goodenough Ring states that the events "do not have planning permission" and "cannot benefit from permitted development rights."
The letter demands confirmation that the events have been cancelled and requests the removal of any fencing or infrastructure.
The lawyers have asked for a response by 10am on May 19.
Both Lambeth Council and festival organisers had their requests to challenge the decision refused by Mr Justice Mould.
