Simon Burns, transport minister stepping down to run for Dep Speaker, No.10 source tells me
— Paul Waugh (@paulwaugh) October 4, 2013
UPDATE: This from Patrick McLoughlin, via the DfT website...
I’d like to thank Simon for his hard work, support and leadership during his time at the department. He has been instrumental in driving forward progress on HS2.
He has also worked tirelessly to put the department’s rail franchise programme on track, ensuring it delivers value for money for the tax-payer and supports the ongoing multi-billion pound investment in our railways.