Complex sentence: As a young player Tony found it increasingly frustrating trying to break into a side packed with full internationals which had been consistently challenging for major honours, but it was not before March 1979 that Tony finally got an extended run in the City side.
Split into simpler sentences: As a young player Tony found it difficult to break into a side packed with internationals which had been consistently challenging for major honours. It was not before March 1979 that Tony finally got an extended run in the City side.