Complex sentence: In March 1999, following his two-month loan at the club, he signed permanently for a fee of £800,000 but, ultimatley was unable to help the Addicks avoid relegation, finishing the season with three goals in eighteen games.
Split into simpler sentences: In March 1999, following his two-month loan at the club, he signed permanently, for a fee of £800,000. Ultimatley in his first season, he was unable to help the club avoid relegation and finished the season with three goals in eighteen games.