Complex sentence: Although British archaeology is not his predominant interest, he appeared occasionally on the Channel 4 television program "Time Team" and was a co-presenter on two series of the BBC Two production, "Time Flyers" 2002-2003.
Split into simpler sentences: Although British archaeology is not his predominant interest, he has appeared occasionally on the Channel 4 television programme "Time Team". He was a co-presenter on two series of the BBC Two production, "Time Flyers" 2002-2003.