Complex sentence: In December 1918, the British expropriated the 25% share of Deutsche Bank in TPC and it was this share that was ultimately to be given to the French under the San Remo oil agreement.
Split into simpler sentences: In December 1918, the British expropriated the 25% share of Deutsche Bank in TPC. It was this latter share that was ultimately to be given to the French under the San Remo oil agreement.