With another Transfer Deadline Day upon us we look back on 20 years of the transfer window in the Premier League and how it has changed English football - and continues to evolve from year to year at the end of the top-flight's most expensive ever summer.PART 1 | Sky Sports News transfer gurus Dharmesh Sheth and Kaveh Solhekol join Peter Smith to discuss whether the transfer window has ever been as big as it is now, what sparks so much interest in transfers, how the window has changed the way clubs operate and whether there may ever be a return to season-round signings.PART 2 | Reporter Paul Gilmour tells Ron Walker about the inner workings of a Transfer Deadline Day on Sky Sports News, how to cut out the noise on the big breaking stories as the transfer window draws to a close, the life of a Training Ground reporter in the final hours of the window - his favourite memories of Deadline Days gone by.