It is alleged that the former MP, Margaret Moran, who stood down at the last election, "flipped" her designated second home, making claims for properties in London, Luton and Southampton.
One of the 21 charges she is facing relates to a claim for £22,500 to treat dry rot at her Southampton home.
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A strike by members of four unions, RMT, Aslef, TSSA and Unite, is expected to bring the Underground to a standstill tomorrow evening.
Official readings are recorded three metres in the air but a study found levels of nitrogen dioxide (NO2) were higher at pushchair level.
Tubes, trains, trams, buses, cable cars, river buses, taxis and going by foot - your guide to getting around during the strike.