Complex sentence: Richard Maunsell was appointed CME of the SECR in 1913, following the enforced retirement of Harry Wainwright, who left a range of competent but unspectacular locomotive classes that struggled to cope with the increased train lengths and loadings.
Split into simpler sentences: Richard Maunsell was appointed CME of the SECR in 1913, following the enforced retirement of Harry Wainwright. Wainwright left a range of competent but unspectacular locomotive classes that struggled to cope with the increased train lengths and loadings.