Details of Singapore's next Master Plan will be unveiled "very soon", said National Development Minister Khaw Boon Wan on Monday morning.

Mr Khaw gave no additional details of the upcoming plan, which will outline Singapore's upcoming physical development, but added that Singapore has come a long way since its first Concept Plan in 1971.

"The underlying philosophy of making Singapore an endearing home and a clean, green, liveable city remains unchanged," he wrote on his blog.

The Minister added that Mr Henry Wardlaw of Sydney, who in the 1960s had headed the United Nations consultancy team responsible for Singapore's 1971 Concept Plan, had returned last month for a visit. Mr Wardlaw, now 91, helped conceptualise Changi Airport's first terminal, the Pan-Island Expressway and the first MRT lines. During his visit, he interacted with Urban Redevelopment Authority (URA) planners and was "overwhelmed and astonished" at how much Singapore had undergone.