He was also a member of the Select Committee on the Modernisation of the House of Commons and served as a vice-chairman of the 1922 Committee. Winterton was one of the few MPs to ask a question at Tony Blair's last Prime minister's questions: he demanded a referendum on the EU Reform Treaty. He was knighted by Elizabeth II in June 2002 for services to Parliament. The Wintertons were investigated by the Parliamentary Standards Commissioner and he concluded that they misused their MPs' expenses to pay rent for a flat that they had already bought outright. Once the mortgage had been fully repaid, the Wintertons transferred the ownership of the flat into a family trust. Since 2002 they had paid the rent to their trust for living in the flat from their MPs' expenditure. The Committee accepted that the Wintertons had "at no stage attempted to conceal their arrangements". Winterton said of his expenses: "I try to tackle matters of expenses in a responsible way, I don't spend any more money than is absolutely necessary". This was at odds with his party's leader, David Cameron, who described them as "indefensible". On 25 May 2009 it was announced that both the Wintertons would stand down as MPs at the next general election. Winterton was accused of slapping Labour MP Natascha Engel's bottom. When asked if the accusation was true, Winterton replied: "I'm quite a normal person. Will I slap a colleague on the back, Will I slap a colleague in friendship? The answer is – it is certainly possible." On 18 February 2010 during a BBC Radio 5 Live interview he defended MPs travelling first class by saying that people who travelled in standard class on trains were a "totally different type of people." Commenting to a BBC reporter, a Conservative spokesman stated that these remarks "...do not in any way represent the views of [...] the Conservative Party." Winterton has been involved in a wide range of organisations and interests. Local charities he supports include the Macclesfield Access Group, the Multiple Sclerosis Society, Riding for the Disabled, Macclesfield Handicapped Social Club and the Rossendale Trust. He is a vice president of the East Cheshire Hospice and a patron of the local branch of the National Society for the Prevention of Cruelty to Children. For 30 years he has been a patron of the Macclesfield & District Sheep Dog Trials Association. He also helps local organisations such as Age Concern and Macmillan Cancer Care and is an honorary member of the Macclesfield & District Lions Club. He is a supporter of Macclesfield Town F.C. and Macclesfield R.U.F.C.  Winterton is also actively involved with local Scouting and Guiding.