Complex sentence: Two companies were set up in 1972 in preparation for future change: "TSB Computer Services Ltd.", co-ordinated all computer systems and related developments, and "Central Trustee Savings Bank Ltd." dealt with volume transactions.
Split into simpler sentences: Two companies were set up in 1972 in preparation for future change. One was "TSB Computer Services Ltd.", to co-ordinate all computer systems and related developments, the other being the incorporation of the "Central Trustee Savings Bank Ltd.", to deal with volume transactions.