From the second sitting of 2018 this material should be expected in the Fellowship paper (or so we can presume, on the basis of the fact that the whole Research Methods and Statistics section has disappeared from the 2017 version of the primary syllabus)

Basic Concepts in Medical Statistics
Basic features of evidence-based medicine
Quality and levels of evidence
Clinical Trial Design
Stages in the design of a clinical trial
Advantages and disadvantages of randomised control study design
Factors which influence sample size calculation
Statistical power
Bias, types of error and confounding factors
Types of Data and Statistical Tests
Basic definitions in statistics
Different types of data
Variability, dispersion and central tendency
Parametric and non-parametric tests
The forest plot and the box-and-whisker plot
The receiver operating characteristic (ROC) curve
Interpretation of Evidence into Practice
Meta-analysis and systematic review