Dates for 2017 just published on the Eaton Estate website.http://www.eatonestate.co.uk/our-giving ... -days.aspx
Sunday 16 April (Easter w/e)
Sunday 28 May (Bank Holiday w/e)
Sunday 30 July
Sunday 27 August (Bank Holiday w/e)
Nothing specific about the railway on that page as yet, but assuming similar arrangements as previously it might be reasonable to expect two batches of timed tickets for train rides to be released, the first upon opening at 1030 for morning trains and then the second around lunchtime for afternoon trains.
Well worth a visit if you haven't been, or to go again if you have!