Some Parliamentary Written Questions have been asked on this (link below.)
http://www.publications.parliament.uk/pa/cm200506/cmordbk1/60724w01.htm

Dr Vincent Cable (Twickenham):To ask the Secretary of State for Transport, whether the formats in which train timetables are produced by Network Rail are governed by regulations.
 
Dr Vincent Cable (Twickenham):To ask the Secretary of State for Transport, what assessment has been made of the impact of changing to internet-only railway timetables.

Dr Vincent Cable (Twickenham):To ask the Secretary of State for Transport, in what formats Network Rail produces train timetables; and whether changes are planned.

Some other questions also caught my eye :

Mrs Gwyneth Dunwoody (Crewe & Nantwich):To ask the Secretary of State for Transport, how many bus companies there are in England. (any guesses?)

Mr John Leech (Manchester, Withington):To ask the Secretary of State for Transport, when he intends to publish the Government's guidance on light rail procurement.

Anne Main (St Albans):To ask the Secretary of State for Transport, if he will make a statement on the progress of the Thameslink 2000 project.

Chris Ruane (Vale of Clwyd):To ask the Secretary of State for Transport, what assessment he has made of the abilities of the (a) rail and (b) road infrastructure to cope in temperatures greater than 30 degrees centigrade.