P1 and B1 are likely to be similar to the 2016 papers, last year. They'll just remove topics where the examiner said in the examiner reports that most students had achieved full marks in the question.
For P1 - Likely to expand on Red-shift, Doppler effect (linked to experiment), The Big bang theory, and generating electricity(linked to graphs and data), as well as all other topics.
For B1 - Plant hormones and the menstrual cycle + IVF, the carbon cycle (probably a 5 marker), than a 6 mark question, and some unusual sections of B1, like indicator species, detritus feeders, and explaining Darwin or Lamarck's theory of natural selection (if not explaining natural selection from a given animal) More likely to have suggest an explanation questions for graphs, and drawing a graph for 2-4 marks.