Complex sentence: After 1910, the works ceased to produce new locomotives, these being subsequently built at Darlington, but continued to maintain and overhaul engines up until 1932, when the decision was made to close them.
Split into simpler sentences: After 1910, the production of new locomotives at Gateshead was discontinued, these being subsequently built at Darlington. The works continued to maintain and overhaul engines up until 1932, when the decision was made to close them.