The Department for Culture, Media and Sport (DCMS) is considering mounting an inquiry into Lambeth library services after receiving complaints from campaigners.
The government department has a duty to intervene under the Public Libraries and Museums Act 1964 if a council fails to provide a “comprehensive and efficient” library service.
The Defend the Ten campaigners said DCMS had been following events in Lambeth for some months.
A DCMS spokesperson said: “The department has received a number of representations concerning the changes made to Lambeth council’s library service provision. After careful consideration, these are being treated as formal complaints in accordance with the Public Libraries and Museums Act 1964.”
The department will write to Lambeth Council to seek information and clarification.
A council spokesman said: “As part of the Culture 2020 planning process we took legal advice to ensure that Lambeth Council’s library proposals met the statutory requirements.
“We would be happy to provide the DCMS details of the cost saving measures we have put in place to ensure Lambeth Libraries remain opening during a period of unprecedented cuts to council budgets.
“Yes there will be changes to library services. But our hard work, in consultation with the community, means that we are not closing libraries – there are ten libraries in Lambeth now, and there will be ten libraries in the future.
“Carnegie Library, for example, will reopen with a library service that will remain free and open to all. The new gym will be housed in the currently unused basement of the building and the rest of the building will provide at least as much community space as now, including a library service.”
The campaigners are organising a public meeting on Thursday (14 April).