Complex sentence: He was welcomed, however, by the Leader of the Opposition, Margaret Thatcher, as well as by former prime ministers Lord Home and Sir Harold Wilson, though two other former prime ministers, Harold Macmillan and Edward Heath declined to meet him.
Split into simpler sentences: He was welcomed, however, by the Leader of the Opposition, Margaret Thatcher, as well as by former prime ministers Lord Home and Sir Harold Wilson. Two other former prime ministers, Harold Macmillan and Edward Heath declined to meet him.