  We present results for the electron-impact excitation of highly-charged
sulphur ions (S8+ - S11+) obtained using the intermediate-coupling frame
transformation R-matrix approach. A detailed comparison of the target structure
has been made for the four ions to assess the uncertainty on collision
strengths from the target structure. Effective collision strengths (\Upsilon s)
are presented at temperatures ranging from 2\times10^2(z+1)^2 K to
2\times10^6(z+1)^2 K (where z is the residual charge of ions. Detailed
comparisons for the \Upsilon are made with the results of previous calculations
for these ions, which will pose insight on the uncertainty in their usage by
astrophysical and fusion modelling codes.
