If suppliers answer 'yes' to Question C3 QP3-1 then then next three questions are not necessary i.e.
C3 – QP3 – 2
C3 – QP3 – 3(a)
C3 – QP3 – 3(b)
C3 – QP3 – 3(c)
These should either be removed if the 'yes' answer is given, or there should be a 'not applicable' option.
See attached correspondence with the National Trust where this was raised as an issue