10:48AM, Thursday 09 February 2012
FGW have put a coach replacement service in place.
A spokesman said a vehicle had hit a bridge in Maidenhead but could not confirm details.
Trains between Marlow and Bourne End are running normally.
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Police raided addresses in Lillibrooke Crescent, Cox Green, and in Crown Lane, Farnham Royal, at about 7.15am.