However, councillors from the IMPACT alliance and Liberal Democrats have raised concerns about the distribution of development, infrastructure, affordable housing and the process used to prepare the plan. She said: “From the outset, the Local Plan was never subject to genuine cross-party engagement. Liberal Democrat shadow cabinet member for planning Cllr Mark Roberts said delays in producing a Local Plan had left Buckinghamshire vulnerable to speculative development. An up-to-date Local Plan gives us greater control over where development takes place and serves as the best defence against unwanted speculative development. “Any suggestions that Buckinghamshire's draft Local Plan has been developed without proper engagement or scrutiny are inaccurate.