Parents say they cannot get into a park that was recently reopened with new facilities for disabled children.
Rocket Park, in Windsor Avenue, Hillingdon, was opened last month by England rugby world cup winner Lawrence Dallaglio, but since then parents have complained of being unable to use the park unless they have a key.
David Cox, who lives in Grosvenor Crescent, said: "The park used to be open all the time, but when I went down there with my grandchildren recently we couldn't get in to use it. We would have needed a key to get in.
"It only seems to be open for an hour a day, between 3 and 4pm. It will cause major problems in school holidays and weekends if it continues like that.
"I'm grateful that they improved the park and it helps the disabled kids, I'm 100 per cent behind that, but it should-n't exclude everybody else. Why close a public park?
"As far as I'm aware the rubbish collectors can't even get in to clean it."
Tim Fuell, a parent, of Victoria Road, Hillingdon, said: "I was told the park was just for disabled children. It has been padlocked for two weeks and the council has been giving us different stories, they aren't all singing from the same hymn sheet on this."
The park was officially opened on October 10, with wheelchair access, after the charity Wooden Spoon had spent £80,000 on the project.
Hillingdon Council refuted claims the park has not been open and insisted it is intended for all users. Mary Worrall, head of highways and green spaces, said: "Rocket Park playground is open every day and locked at night.
"It has a unique, inclusive layout which is specially designed to be accessible for children with a very wide range of abilities. The park is open for use by all children, seven days a week from 9am until dusk."
Have you had any trouble using Rocket Park? Call the Gazette on 01895 451030 and we will investigate.