Maths Emporium tweeted:
*Assessment Materials Update* Pearson Edexcel have confirmed that the ONLY materials to be unlocked to students on 19 April will be the additional assessment materials released last week. ALL past paper content and mark schemes will stay LOCKED!!! Thank goodness!
It's perhaps worth noting that this is potentially (very) misleading:
(1) 2018 is publicly available, and will obviously remain so
More to the point:
(2) 2019 and 2020 past paper questions are being released as part of the AAMs, just not as whole papers
So 2019 and 2020 Past Papers and MSs will remain locked as whole papers
BUT...
some, possibly even all, 2019 and 2020 Past Paper questions will be unlocked to students on 19th April, only they'll be arranged in "Questions By Topic" style