She unveiled new road signs celebrating Buckinghamshire as the birthplace of the Paralympics.

Grey-Thompson also opened new passenger lifts at the railway station Aylesbury, the station most used by athletes when they visit Stoke Mandeville.

Grey-Thompson said: "I am really pleased to be invited to Aylesbury on this special day. 

"Stoke Mandeville is very close to my heart. I have passed through this station on many occasions to and from training sessions and competitions.

"I am delighted that that journey will now be so much easier for everybody with the installation of these lifts.

"The London 2012 Games are a great driver for change across the country and the improvements to the accessibility of transport facilities which has been so clearly demonstrated today here in Aylesbury will be one of the great legacy benefits from the Games.”

The lifts at Aylesbury station, which is used by athletes visiting Stoke Mandeville Stadium, were funded jointly by Buckinghamshire County Council, Aylesbury Vale Advantage and Chiltern Railways with additional funding from the Department for Transport Access for All Project.

They make the station fully accessible for the first time.

Valerie Letheren, the Cabinet Member for Transport at Buckinghamshire County Counci, said: "This official opening marks the latest landmark in a wide range of initiatives we are putting in place around the town to improve accessibility for everyone. 

"Being the birthplace of the Paralympics, it is especially important that we ensure that all residents and visitors can easily access public transport.

"Working with bus companies we have ensured that services in and out of the town are wheelchair accessible and our colleagues at Aylesbury Vale District Council have been working with taxi services to ensure likewise.

"The development of the new integrated transport hub in the town centre has helped ensure that all of these services are located in the same place to offer a variety of quality transport options for everybody."

Chad Collins, the general manager south of Chiltern Railways said: "We’re delighted to be officially opening our lifts at Aylesbury station on the 50th anniversary of the first Paralympic Games. 

"We start work next week on further improvements to Aylesbury station which will continue to improve accessibility and the travel experiences for all our passengers."

Mary McAnally, the London 2012  Nations and Regions nember for the South East of England and the deput chairman of the South East Partnership for the London 2012 Games, said: "The South East Partnership has long recognised the importance of Stoke Mandeville and its role in the foundation of the modern-day Paralympic Games and has set an ambition to make the South East a truly accessible region to all. 

"It is fitting that we should mark the 50th Anniversary of the first Paralympic Games by unveiling road traffic signs that will forever mark the significance of Stoke Mandeville within the County and that today, we recognise and launch a number of programmes that will bring us ever closer to achieving our ambition."