Mr Illsley was re-elected in May 2010 with a majority of more than 11,000 The trial of an MP accused of dishonestly claiming parliamentary expenses is expected to begin later.
Eric Illsley faces three charges of false accounting relating to claims for council tax, maintenance, repairs and utility bills between 2005 and 2008.
Mr Illsley, who was re-elected as Labour MP for Barnsley Central at the general election, denies the charges.
He was suspended by the party after being charged and now sits as an independent in the Commons.
The Crown Prosecution Service has alleged that the MP – being tried at Southwark Crown Court – falsely claimed more than £20,000 in payments towards his second home in London over a three year period.
Mr Illsley has been an MP since 1987 and was re-elected with a majority of more than 11,000 in 2010.
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