The couple's agents, Graham and Sibbald, say that the height of the buildings could be increased if the green light is given for a separate application to build an 80-bedroom hotel on the hilltop site at Kinkell Braes — which itself has generated a raft of objections.

Opponents of Mr and Mrs Wilson's proposals argue that the land is not earmarked for residential use in the Local Plan and that a new housing development would mean a loss of privacy for neighbouring residents — mainly in Braid Crescent — as well as loss of visual amenity and noise and light pollution.

And they say that the land is an area of great landscape value that heralds the approach to the coastal path and is home to moles, rabbits, mice and hedgehogs.

They claim that the land attracts migrating birds, herons and foxes and the adjacent slope is covered in colourful wild flowers that are enjoyed by locals and visitors.

In addition, they are concerned that the site is vulnerable to erosion as sea levels continue to rise.

Graham and Sibbald said the Wonder Years nursery is a successful business and that Mr and Mrs Wilson plan to open another nursery, this time in the centre of Edinburgh, in the near future.

However, the current facility at East Sands is not ideal in terms of its expansion potential, and the couple are hoping to realise development value from the land while actively seeking a more suitable site for their St Andrews venture.

If the application is approved, say the agents, the development could include at least an element of specialist housing for the elderly or students.

No detailed plans have been submitted at this stage but the couple are hoping to get an agreement in principle for the development when the application is considered by north east Fife area committee.